The Evidentiary Authority of Genetic Fingerprinting (DNA) in Contemporary Islamic Law

The Evidentiary Authority of Genetic Fingerprinting (DNA) in Contemporary Islamic Law — Basira

Genetic fingerprinting is strong scientific evidence closer to certainty. It relies on objective laboratory records unaffected by personal inclinations. Human testimony, by contrast, depends on the memory and probity of witnesses and may be subject to interpretation or denial. An admission, likewise, may be made falsely, out of courtesy, under duress or to avert harm. The result of a genetic analysis, however, is fixed and leaves no room for denial or retraction. It is therefore more reliable than a bare admission or the testimony of witnesses in uncovering the facts.

The supporters argue that the jurists of the past accepted qiyāfa in limited cases, even though it rests on outward intuition and carries a high likelihood of error. Genetic fingerprinting, assessed by analogy with qiyāfa, is all the more deserving of acceptance. Indeed, it should take precedence over qiyāfa because it is more accurate and more certain. Qiyāfa relies on observing resemblance in features and is prone to illusion and error, yet some scholars accepted it out of judicial need. How then can we reject a modern means whose scientific accuracy reaches 99.99% or more?! This is all the more so since medical studies have shown that DNA analysis can reach certainty, or an assurance close to certainty (approximately 100%), in establishing biological lineage.
Reason and the conduct of rational people (sīra ʿuqalāʾiyya). Rational people throughout the world today rely on this technique to establish filiation and personal identity. The shariʿa has endorsed many of the methods of proof used by rational people so long as they do not contradict a definitive text.

For example, the rule of possession (qāʿidat al-yad) in fiqh was established because rational people regard “the hand (possession) as an indicator of ownership.” The Lawgiver endorsed this conduct, making the possessor the apparent owner of things until stronger evidence is established. Similarly, a modern rational custom has spread of regarding genetic fingerprinting as strong evidence in matters of lineage and others, and no prohibition of it has come in the shariʿa. It may therefore be said that the conduct of rational people in relying on it makes it a shariʿa proof, on the basis of the rule that the shariʿa endorses (imḍāʾ) reliable means of disclosure.

The International Islamic Conference and the laws of many Islamic countries have approved making use of modern scientific evidence. For example, the Iraqi Evidence Law (1979 CE) provides that the judge may make use of the means of scientific progress to infer judicial presumptions. Naturally, a presumption that reaches a high degree of accuracy is relied upon judicially. There is therefore no shariʿa objection to adopting the same approach in shariʿa courts.
The objectives of the shariʿa in preserving lineage and preventing injustice. Attaching a child to his real father and holding each party responsible is a great shariʿa objective. The shariʿa instituted liʿān, for instance, to negate an illegitimate child from the husband in order to preserve the purity of lineage and to lift injustice from him. If the lineage of a child to a particular man is established scientifically with near certainty, it would be unjust to deny it merely because of doubts, illusions or evasion of maintenance. Doing so would deprive the child of belonging to his real father, or deprive the father of his child.

The supporters therefore hold that the texts on the bed and liʿān should not prevent arriving at the truth in every case. Those texts were laid down to address situations according to the means available at the time. Today a means of uncovering the truth to a high degree has become available, and it must be employed to prevent the confusion of lineages and to correct errors as far as possible.

They also argued that the Umma, including its scholars, has accepted modern means of establishing identity for issuing documents, such as fingerprints, signatures and photographs, none of which were known previously. If relying on these is permissible in financial and administrative rights, then relying on DNA fingerprinting is all the more permissible in important cases relating to the rights of Allah and of people, such as lineage, so long as it achieves the purpose.

Type of case	Shariʿa position on DNA evidence	Shariʿa conditions and controls	Juristic notes
Establishing lineage (filiation and paternity)	Disputed: traditional reservation versus contemporary support.	Opponents: relied upon only as a last resort, where there is necessity and confusion, and it does not negate a lineage established in the shariʿa (the bed is overturned only by liʿān). Supporters: valid if its scientific accuracy is established and it is supervised by trustworthy experts.	The majority permit its use to resolve difficulties (mixed-up newborns, persons of unknown lineage), but some do not accept the overturning of a settled lineage except through shariʿa procedures (liʿān).
Negating lineage (negating the child from the husband)	Likewise disputed.	Traditionalists: negated only by liʿān; DNA is not a substitute, owing to the hadith “the child belongs to the bed…”. Reformists: if certainty or assurance of the analysis's soundness is obtained and it scientifically excludes the husband, a ruling of negation without liʿān is permissible (while observing formalities to avert discord).	Al-Sistani, for example, holds that the rule of the bed operates where there is doubt, and that it lapses if knowledge to the contrary is obtained by a clear scientific method. This reinforces the role of DNA in rendering justice to the husband and in his defence against a wife who conceived by another man.
Ḥudūd crimes (zinā, qadhf, theft, wine)	Not relied upon alone to carry out the ḥadd.	The shariʿa text stipulates witnesses or a specific form of confession; scientific evidence does not substitute for these. It may, however, be used as evidence in investigation or as proof in taʿzīr.	If the result is negative (refuting the charge), it is taken into account immediately to avert the ḥadd. As proof of guilt, it is not considered sufficient for the ḥadd, but it may justify a lighter taʿzīr according to the ruler's judgment.
Qiṣāṣ crimes (homicide and lesser injuries)	Strong circumstantial evidence relied upon among the proofs.	If there is shariʿa evidence (witnesses or confession), DNA is needed only to reinforce it. If explicit evidence is absent, it may be regarded as shariʿa lawth for applying qasāma or for binding the accused or the victim's heirs to oaths.	Many contemporary jurists permit the judge to rule on conclusive circumstantial evidence in homicide if he is assured, because denying the victim's heirs qiṣāṣ despite near-conclusive evidence is contrary to justice. It is preferable, however, to complete the shariʿa form, for example through qasāma.
Refuting accusations in general	The fingerprint is valid proof for refutation.	Any conclusive evidence of innocence must be accepted in the shariʿa, as doubt is interpreted in favour of the accused. If DNA negates any connection of the accused to the crime, it definitively requires a ruling of innocence (or the lapse of the ḥadd).	Examples: exoneration of a rape suspect whose DNA does not match samples from the crime scene; exoneration of a theft suspect because the fingerprints do not match… etc. In these cases, imposing the ḥadd or qiṣāṣ is definitively prohibited.

The rule of possession: As mentioned, this rule treats a person's possession of a thing as an indicator of his ownership of it. It is firmly rooted in transactions and elsewhere, to the point that it has been said: “What is in your hand is yours until the contrary is proven.” What concerns us is that the Lawgiver endorsed this strong rational amāra and gave it precedence even over some principles, such as istiṣḥāb of another person's prior ownership.

Some may draw on it by analogy to accept the “hand of science.” Tangible scientific evidence, such as forensic medicine establishing the presence of a person's DNA on a murder weapon, is tantamount to his “laying his hand” on the crime. A person's hand on property leads us in the shariʿa to presume his ownership. In the same way, his genetic traces at the crime scene lead us to presume his participation. This remains, of course, a presumption open to rebuttal by contrary evidence, but it has prima facie probative force.

Genetic fingerprinting may thus be classed as an amāra of the “hand” type in its own domain. In zinā, for example, we do not see the man's “hand” on the woman, but the presence of his “genetic fingerprint” inside her womb is like proof of contact. That contact, however, is unlawful, so it entails a taʿzīr punishment and not the ḥadd.
The rule of lawth (in qasāma): We have explained that DNA is the strongest lawth imaginable, so it is clearly and definitively covered by qasāma for those who uphold qasāma. Some researchers have even asked why the lengthy oaths of qasāma are needed at all if a genetic fingerprint on the victim's body points to the perpetrator with certainty. Is this alone not more eloquent than fifty oaths? Here modern judicial certainty collides with old shariʿa formality.

The middle solution adopted by the laws of some Islamic countries is to combine the two. The judge may regard the DNA result as sufficient evidence but supplement it with a formal qasāma in order to preserve the text. Alternatively, he may rely on it, by way of inference, to rule for diya, for example, rather than qiṣāṣ. In all cases, the rule of lawth strengthens the probative force of DNA rather than negating it.
The procedural principles (barāʾa, istiṣḥāb): Where there is doubt about any criminal accusation, the default is innocence until the contrary is proven. Where there is doubt about lineage, the default is that settled lineage continues and is not overturned. These principles are the last resort when no stronger recognized evidence exists. Once genetic fingerprinting is ruled to be a shariʿa proof (an amāra), we no longer need the principle, since we now have evidence. If, however, we rule that it is merely a doubt not recognized by the shariʿa, we hold fast to the principle.

The position therefore differs according to the approach. Those who oppose it on shariʿa grounds say: “We remain with the principle of exemption from the ḥadd and pay no attention to the indication,” or “We remain with istiṣḥāb of the valid marriage and of the child's lineage to his mother's husband, and do not overturn it by a test.” The supporters reverse the equation. They say: “This scientific indication removes the matter from the realm of doubt in which barāʾa or istiṣḥāb would apply; it has become an amāra against the principle and takes precedence over it.”

It is established in uṣūl that recognized amārāt govern the procedural principles, that is, they take precedence over them. If we make DNA an amāra, there is no room for barāʾa or istiṣḥāb that runs contrary to it. This clarifies the theoretical crux of the inquiry.

Establishing lineage in paternity and maternity cases: Judges today use DNA analysis to settle lineage disputes. These include a man's claim to be the father of a child, a husband's denial that he is the father of his wife's child, or a family's claim that its newborn was mistakenly swapped with another in hospital. Science has succeeded in bringing proof in these cases close to certainty, so many courts rely on it as decisive evidence, or at least as a strong deciding factor.

In the shariʿa, as mentioned, there are different approaches. The prevailing approach permits its use provided it does not clash with a definitive shariʿa text such as the bed or liʿān. Personal status courts in the Gulf states, Egypt and elsewhere, for example, accept filiation analyses in cases of negation of lineage and of mix-ups. Al-Azhar and the Islamic Research Academy in Egypt have issued a fatwa permitting reliance on genetic fingerprinting in the courts as strong circumstantial evidence to establish lineage, although the bed remains the default where the two conflict.

In Iran and Iraq, the shariʿa courts apply DNA tests routinely in matters of lineage. The website of Sayyid al-Sistani has stated that “the criterion (what counts) in establishing lineage is the assurance obtained through clear scientific methods,” which indicates the practical adoption of the technique.

On the medical level, these paternity tests are also used for civil purposes, such as establishing lineage to obtain citizenship or social rights. Here too, shariʿa bodies stipulate that the test must not be exploited to demolish established lineages except rightfully. A person is not permitted in the shariʿa, for example, to secretly test the father who raised him to find out whether he is his biological son, and then demand that his lineage be overturned, because this opens the door to social discord. For this reason, some Arab laws have prohibited lineage tests except by court order. This is consistent with the shariʿa, since it is not permissible to violate the sanctity of families and cast doubt on their lineages without a strong shariʿa justification.
Negating lineage and confirming non-paternity: Likewise, where a woman is accused of zinā and the husband wishes to negate the child, the DNA test has become a lifeline for many suspicious husbands in place of liʿān. Some contemporary jurists have permitted relying on genetic fingerprinting alone, without liʿān, if its result shows that there is no lineage between the husband and the newborn and there are no indicators to the contrary.

Some Sunni fatwas have also taken note of this, such as the fatwa of the Islamic Fiqh Academy in Jeddah (Organisation of the Islamic Conference). It permitted the use of genetic fingerprinting to negate a child in cases of dispute or doubt, on condition of judicial permission. It nevertheless continued to prohibit negating a child definitively established by the bed except through liʿān, in order to preserve the text. In practice, Sunni courts still require liʿān as a shariʿa text. They may, however, treat the DNA result as evidence that supports the husband's entitlement to perform liʿān and to the dissolution of the marriage.

In Jaʿfari courts, there have been cases in which the courts negated lineage on the basis of a proven genetic test. They completed certain shariʿa requirements, such as the testimony of witnesses to the act of zinā where possible, or the like, in order to lift the ḥadd from the woman. [CHECK: the stated purpose (lifting the ḥadd from the woman) seems inconsistent with witness testimony to zinā]
Criminal forensic medicine (uncovering crimes): In criminal investigations, DNA fingerprinting has become the gold standard. Any biological trace at the crime scene, such as a hair, a drop of blood, skin cells, semen or saliva on a cigarette butt…, is analysed and compared with the fingerprints of suspects. If a 100% match appears with a person, the authorities regard it as strong evidence of his presence at the crime scene or of his connection to it. Thousands of criminals around the world have been convicted in this way, and others have been exonerated.

From a shariʿa perspective, this application is acceptable and permissible within the procedures of taʿzīr and the pursuit of justice. When rulings are carried out, however, it is subject to their controls. If a shariʿa ḥadd would result from it, the other conditions must be fulfilled, as we have seen. If the crime warrants qiṣāṣ or taʿzīr, the scientific evidence is given strong weight.

The Council of the Islamic Fiqh Academy in Mecca issued a resolution permitting the use of genetic fingerprinting in criminal investigation and in tracking criminals, with reservations in ḥudūd cases. Islamic countries that partially apply the shariʿa, such as Saudi Arabia, actually use genetic fingerprinting to uncover murders and rapes. The offender may be punished by taʿzīr with death or imprisonment on the basis of all the circumstantial evidence together with DNA, even if the ḥadd for zinā or for ḥirāba (armed robbery) is not formally imposed on him. This realizes the shariʿa's aim of safeguarding security and repelling evildoers while preserving the texts.
Identifying the missing and the dead: Among the noblest uses of DNA today is identifying unidentified bodies, for example victims of wars and disasters, by matching them with presumed relatives. This ensures that the deceased is buried in accordance with the rulings that apply to him, that the remains are handed over to his family, and that disputes are ended. The shariʿa encourages whatever honours the deceased and secures knowledge of his rights, so this application poses no problem.

Contemporary maraji have issued fatwas permitting the exhumation of a grave for a DNA test if that is the means of identifying the person buried in it, restoring his rights or the like. This shows the flexibility of fiqh in serving its objectives.

Establishing personal identity is likewise applied judicially. A person may claim to be the son of so-and-so, as his heir for example, with no evidence other than a genetic test. If the test yields strong assurance, most jurists permit attaching rulings to it, such as granting inheritance, treating it as a very strong preponderant belief, unless a shariʿa text on the subject contradicts it.
Private medical and genealogical tests: There are medical uses for detecting hereditary diseases or genetic predispositions. These pose no shariʿa problem and fall outside the discussion of probative force, since they are therapeutic means rather than proofs establishing a right or a crime.

Tests of distant ethnic or tribal lineage, however, are controversial. They have recently become widespread in some circles, for example among people who want to know whether their lineage goes back to the Ahl al-Bayt (the Prophet's household). Scientific bodies have announced that DNA analysis can reveal certain general ethnic affiliations, such as genetic markers shared among a particular line of descendants. This application is not accurate enough, however, to prove that so-and-so belongs to the line of a noble family, for example; it yields only probabilities.

Hence fatwas have been issued, including by Sayyid al-Sistani, that “no account is taken of DNA testing in establishing distant lineage to a tribe or family.” At most, it indicates that certain traits are shared, which does not rise to certainty, and rulings such as the title of Sayyid Sharif may not be built upon it. Those who use it should do so only for personal reassurance, without treating it as proof of shariʿa lineage.
Proving zinā in modern courts: This point deserves practical clarification. We mentioned that the shariʿa ḥadd is not established by the fingerprint. But what of the modern judiciary in Muslim lands, where the ḥudūd are generally not applied and taʿzīr punishments and imprisonment are used instead? Many shariʿa judges hearing zinā charges use DNA to prove the indecency and to impose taʿzīr on its perpetrators, by imprisonment for example, without carrying out the shariʿa ḥadd.

A real example: in one case, a woman was found pregnant out of wedlock, claimed coercion and accused a person. After testing, the shariʿa court ruled that the lineage traced to that person was sound. It did not sentence him to stoning (the ḥadd for zinā by a married person) for lack of shariʿa evidence. It confined itself to a taʿzīr sentence of imprisonment and flogging as punishment for the zinā established scientifically and for what is commonly regarded as rape.

This is a kind of practical reconciliation between scientific evidence and the limited scope of ḥadd evidence. Jurists tend to permit it, because the judge has the authority to impose taʿzīr beyond what the text specifies when there is strong circumstantial evidence. Ultimately, the criminal whose crime is scientifically proven does not escape entirely, but he is not given a ḥadd penalty unless its conditions are met.

The view of Sayyid Abu al-Qasim al-Khoei (may his soul be sanctified): His recorded fatwas (in the book Sirat al-Najat and elsewhere) indicate that he did not agree to attaching shariʿa effects to genetic fingerprinting tests in lineage. He was asked whether lineage is established or negated by a DNA test, and replied: “No shariʿa effect follows from the said tests, whether of negation, establishment or attribution.” This text explicitly denies its probative force absolutely. His students explained that the shariʿa proofs of lineage are limited in number and no new proof has come that recognizes these analyses, so they remain merely probabilistic, non-binding evidence.

It has also been reported that His Eminence held that the child remains attributed to the marital bed in the shariʿa even if the analysis proved the contrary. Sayyid al-Sistani indicated this in answering a query, stating that Sayyid al-Khoei regards the husband as the father in the shariʿa even when a test negates paternity. Sayyid al-Khoei's premise is thus clear: the shariʿa rules in this area are devotional and take precedence over any newly emerged proof that is not certain.

On crimes, no recorded view of his specifically on DNA has reached us. Judging by his uṣūlī fatwas, however, it is clear that he would not permit establishing a ḥadd or qiṣāṣ on the basis of such circumstantial evidence alone, and would require the forms of evidence set out in the texts. In summary, his view is that genetic fingerprinting is not a shariʿa proof for establishing or negating lineage, nor for attaching children of zinā to their fathers. In his view, it is circumstantial evidence without judicial recognition.
The view of Sayyid ʿAli al-Sistani (may his shadow endure): His fatwa on the question is more flexible and detailed. From the published queries answered by his office, his position may be summarized as follows. He regards genetic fingerprinting as a clear scientific route with probative force if it is free from personal error.

He was asked directly whether a DNA test counts as shariʿa evidence of paternity if there is a 100% match, and whether a non-match counts as evidence of negation. He replied: “Yes, the said test is considered (shariʿa) evidence so long as it is a clear scientific method not interspersed with personal judgments.” This is a strong statement recognizing it as proof. In the same answer he affirmed: “Yes, it is obligatory (to attach the child to his biological father).” He added that it does not appear permissible to register the child in the name of anyone other than his actual father as a way of warding off harm. This shows that he gives the actual truth precedence over other considerations.

Elsewhere, a detailed case was put to him. A husband who came to doubt, after some years, that he was the father of two children conducted a DNA test, which showed that he could not possibly be their father. He asked: Is the test result to be relied upon in negating lineage? Is it permissible to keep the children attributed to him while he believes otherwise? And what of the marjaʿ al-Khoei's view that the shariʿa lineage remains despite the test? Sayyid al-Sistani answered on three points:
1. If the test is conducted by a clear scientific method with no room for interpretive error, its result is acted upon.
2. It is not permissible in the shariʿa for the man to continue attributing the two children to himself while knowing that he is not their father; that is, correction is obligatory.
3. In Sayyid al-Khoei's view, the rule “the child belongs to the bed” applies specifically where there is doubt and no knowledge; where there is knowledge to the contrary, it lapses.
This third point corrects the understanding of al-Khoei's fatwa: if certainty is attained, for example through DNA, al-Khoei himself would not retain the apparent ruling of the bed.

Accordingly, al-Sistani fully supports relying on DNA whenever it is reliable, and opposes a person remaining attributed to someone other than his father when the contrary has become scientifically evident. He also stated in another query that the criterion for establishing lineage is the attainment of assurance, even through modern scientific methods.

On the ḥudūd and crimes, his position is that the ḥadd is not established by DNA, but that DNA is used to avert the ḥadd. This follows clearly from his principle of averting the ḥudūd by doubt. We have not found a direct text from him on this. However, since he is a member of the International Islamic Fiqh Academy, he has agreed with its resolutions, which we have summarized above. [CHECK: the source's claim that al-Sistani is a member of the International Islamic Fiqh Academy]

It may therefore be said that Sayyid al-Sistani is among the most prominent supporters of the shariʿa judiciary's use of genetic fingerprinting where appropriate, with reservations in ḥudūd cases. His objectives-based outlook is further confirmed by his answer when asked about tests of the lineage of sayyids (descent from the Ahl al-Bayt). He answered that they are not to be relied upon, since at most they establish a probability regarding distant lineage. This shows that he distinguishes between what is merely probable and what yields assurance. In direct lineage, he regards DNA as usually yielding assurance, unlike lineages spanning hundreds of years.
The view of the martyred Imam Sayyid ʿAli Khamenei (may Allah sanctify his pure soul): To our knowledge, His Eminence did not issue a lengthy, detailed fatwa, but his answers to queries contain references to the question. The gist of what can be understood is that he does not regard genetic testing as an independent shariʿa proof unless knowledge or objective assurance is obtained from it. One answer states: “The said test is not a proof, either in negation or in establishment, unless knowledge or assurance is obtained from it.” This is very close to Sayyid al-Sistani's statement, with added emphasis that assurance is a condition for recognition. He also stated: “In any case, there are details in the matter, and the ruling may differ in some scenarios,” which indicates flexibility in application.

In the same context, some scholars have reported that the martyred Sayyid Khamenei permits the court to rely on DNA in lineage cases if the required scientific and ethical conditions are met and the limits of its use are regulated. On the ḥudūd, the Tehran fiqh academy takes a position close to that of the other academies: testing is insufficient for carrying out, for example, the ḥadd for zinā.

The martyred Sayyid Khamenei thus accepts genetic fingerprinting as recognized circumstantial evidence if it produces assurance, but does not always regard it as complete proof in itself. In his juristic method he is known for strictness, out of precaution, in certain matters of blood and sexual relations. On the whole, however, he does not object to using it to reach a just ruling. Iranian courts did in fact apply DNA in many lineage cases during the period of his leadership, with general juristic approval.

Ayatollah Sayyid Muhammad Saʿid al-Hakim (may his soul be sanctified): He required knowledge and personal certainty before the test result could be recognized. He said that it holds only for the one who has attained certainty through it and is not a proof against others, and that mere assurance is not sufficient. He is thus more reserved than al-Sistani and Khamenei, since he requires subjective rather than objective certainty.
Ayatollah Shaykh Ishaq al-Fayyad (may his shadow endure): He stated that “DNA testing is not a shariʿa proof,” which places him among those who reject its probative force. He may mean that it is not sufficient on its own as shariʿa evidence. He may also distinguish between its use as circumstantial evidence in taʿzīr and crimes against persons, which he permits, and its use in establishing ḥudūd and lineage, for which he does not deem it sufficient.
Ayatollah Shaykh Wahid al-Khurasani (may his shadow endure): In the context of negating lineage, he answered that genetic fingerprinting is not regarded as shariʿa evidence. He is known for great caution in matters of blood and sexual relations, so his view is consistent with not giving such circumstantial evidence legislative value.
The martyred Sayyid Muhammad Baqir al-Sadr (may his soul be sanctified): He did not live to see the details of this technique, having been assassinated in 1980 CE. In some of his theoretical studies, however, he mentioned that scientific techniques could be used to establish matters of fact, provided they do not contradict the texts. It may be said that had he lived longer, he would have given a progressive view, perhaps similar to that of his students, such as Sayyid Kazim al-Haʾiri, who supported it with conditions, and others.
Ayatollah Shaykh Muhammad Asif Muhsini (may his soul be sanctified): He was among the senior contemporary Afghan scholars and wrote on emerging medical issues. He is reported to have said that certainty discloses reality intrinsically, meaning that knowledge, however obtained, is a proof. Whenever genetic fingerprinting produces customary knowledge, it is therefore a proof without any difficulty. He also held that the rule of the bed was instituted as a route to the truth, not as a constitutive subject. He supported the use of the test to establish paternity and filiation, with precaution in some cases.

From a purely scientific standpoint: Genetic fingerprinting is exceptionally strong and distinctive evidence for disclosing the biological identity of persons, with an accuracy exceeding 99.9% in establishing filiation or a criminal match. The possibility of error exists, but it is very slight when correct scientific procedures are followed. This scientific standing makes it, in the eyes of rational people today, evidence as close as can be to certainty. In practice it has contributed to justice by uncovering criminals, exonerating the innocent and correcting mixed-up lineages.
From the juristic standpoint of the shariʿa: Jurists agree that genetic fingerprinting may be used in investigations and to strengthen probabilities, but differ over whether it is independent shariʿa evidence of proof.
- On lineage, many held that it is a recognized means of proof, provided it is scientifically reliable and does not conflict with a definitive text such as the hadith “the child belongs to the bed.” They therefore accepted it particularly where it does not conflict with an established bed, or to resolve problems of mix-ups. Others, out of concern for the existing shariʿa rules, refused to rely on it alone to attach or negate lineage, although they permitted its use as a supplement in case of necessity.
- On the shariʿa ḥudūd, there is juristic consensus, Sunni and Shiʿi, that the ḥadd for zinā or any other ḥadd is not carried out on the basis of DNA alone without witnesses or confession, because the shariʿa has stipulated averting the ḥudūd by doubts. It is, however, used to avert the ḥadd from the accused and is regarded as a doubt that cancels the punishment.
- On qiṣāṣ and taʿzīr, genetic fingerprinting is very strong circumstantial evidence on which judgment may be based. This may be done by conducting qasāma on the basis of the lawth it provides, or by a taʿzīr ruling against the offender if the judge is assured of his guilt.
In sum, the use of genetic fingerprinting is lawful in the shariʿa and permissible in itself; the debate concerns only its probative force. It is a recognized proof outside the ḥudūd, subject to the controls. In the ḥudūd, it is circumstantial evidence that is insufficient in itself for conviction, yet amply sufficient for acquittal.
From the uṣūlī and theoretical standpoint: The probative force of DNA rests on its having become part of the “conduct of rational people” in proof. The shariʿa inclines to endorse the methods rational people use to secure rights unless they clash with a clear text. There is no real conflict between relying on DNA and the objectives and texts of the shariʿa, except in certain special cases, for example negating a child born on the bed without liʿān. These cases can be resolved by moderate fatwas that take both sides into account, as the later maraji have done.

The rule “the child belongs to the bed,” for example, remains respected and valid for regulating public order. It is, however, restricted to situations in which no stronger evidence is available; where such evidence exists, such as genetic knowledge, the rule no longer applies, as some leading scholars have stated. The rule of averting the ḥudūd also clearly explains why the shariʿa did not accept DNA in zinā: where there is doubt, averting punishment takes precedence over carrying it out.

In the final analysis, most contemporary jurists class DNA as a strong amāra that discloses reality. Where it exists, it takes precedence over the procedural principles, because it produces ordinary assurance that overcomes doubt. Those who do not recognize it at all argued from the remaining possibility of error and from the prohibition on overturning the apparent meaning of a text on the basis of a probability. This view, however, is losing ground with time and experience.
In real-world applications: Genetic fingerprinting has proven successful in serving justice. It has settled complex lineage disputes with near certainty and has been used to correct the situations of newborns who were mixed up. It has made it possible to uncover murderers and criminals in crimes that traditional methods could not solve. It has also helped identify martyrs and missing persons and give everyone their due. These achievements accord with the objectives of the shariʿa in preserving life, lineage, honour and property.

Many fiqh academies have therefore adopted positive resolutions on it. The International Islamic Fiqh Academy approved its use “in proving crimes and lineages” under conditions, as did the Islamic Research Academy at al-Azhar. Judicial councils in Saudi Arabia and elsewhere have also laid down regulations for it. Positive law in Islamic countries generally makes room for DNA as evidence, but does not oblige the shariʿa judge to adopt it if a religious text prohibits it. This is a good balance between the sovereignty of the shariʿa and respect for science.
The views of contemporary maraji: The senior Shiʿi maraji agree that DNA may be used, and differ on the rank of its probative force.
- Sayyid al-Khoei represents the approach of absolute reservation: it has no shariʿa effect in lineage. Sayyid al-Sistani's comment on his statement showed, however, that even al-Khoei limited his statement to situations of doubt and absence of certainty.
- Sayyid al-Sistani clearly affirmed the probative force of genetic fingerprinting in judicial proof and issued fatwas attaching rulings to it, which is considered a major juristic development.
- The martyred Sayyid Khamenei requires assurance from the result. In most practical cases this means relying on it, while leaving room for precaution where there is doubt.
- Others either required personal certainty or denied its apparent probative force, but all stressed that it should not be entirely disregarded.
On the whole, the general juristic current today is moving towards accepting scientifically conclusive results rather than overlooking them, whether by updating fatwas or by judicial adaptation, such as taʿzīr in place of the ḥadd. This shows that Islamic jurisprudence is capable of accommodating scientific evidence within its system without contradicting the definitive tenets of the shariʿa.

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The Evidentiary Authority of Genetic Fingerprinting (DNA) in Contemporary Islamic Law

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Knowledge journeys on this subject

Introduction

The Juristic Dimension: The Validity of DNA as Shariʿa Proof

First: Establishing or Negating Lineage by Genetic Fingerprinting

Second: Relying on DNA in Criminal Cases and Refuting Accusations

The Uṣūlī Dimension: A Legal-Theoretical Analysis of the Probative Force of Genetic Fingerprinting

Genetic Fingerprinting between Amārāt and Procedural Principles

The Relationship with the Conduct of Rational People and Juristic Maxims

Contemporary Judicial and Medical Applications of Genetic Fingerprinting

Views of Leading Contemporary Jurists on the Probative Force of DNA

Summary of the Study and Findings