Right To Know Biological Identity: Calcutta High Court Directs DNA Tests In Baby Swap Case

A Case More Humane Than Criminal: Court's Opening Observation

The Calcutta High Court has directed DNA testing of two young children as part of a criminal investigation into an alleged baby swap at a Durgapur hospital, observing that the case is " more humane and sensitive than criminal in nature " as it concerns the biological identity and welfare of the children. Justice Kausik Chanda, hearing a criminal revision petition, held that the pursuit of biological truth must be balanced against privacy and emotional consequences, but refused to allow the uncertainty to continue indefinitely.

The Alleged Swap: How the Case Began

The case originates from a complaint filed by Nargish Bano, who alleged that her newborn daughter was exchanged with another baby at Health World City Centre, Durgapur in July 2023. According to the petitioner, she noticed on July 12, 2023 that the identification tag attached to her child bore the name "B/O Baishakhi Guin" — referring to another mother who had also delivered a girl child on the same date. Despite the nurse changing the tag, a discrepancy in blood-group entries deepened the petitioner's suspicion that the babies had been swapped.

An FIR was registered at Durgapur Police Station on August 22, 2023 under Sections 417, 420, 406, 506, 120B and 34 of the Indian Penal Code. The investigating agency initially sought DNA testing of the petitioner, her husband and the child in their custody. After the Magistrate rejected the prayer, a coordinate bench of the High Court directed the test. The DNA report dated March 7, 2025 did not establish the petitioner and her husband as the biological parents of the child in their custody.

The petitioner then sought DNA profiling of the opposite parties (the other couple) and the child in their custody, arguing that comparative analysis was the only reliable means to determine which child belonged to which parents. The Magistrate rejected this prayer on August 11, 2025 on the ground that the opposite parties had not consented. This order was challenged before the High Court.

Arguments For and Against DNA Profiling

Mr. Satadru Lahiri, appearing for the petitioner, argued that without comparative DNA profiling, it would be impossible to identify the victim of the alleged offence. He placed strong reliance on Section 5 of the Criminal Procedure (Identification) Act, 2022, which empowers a Magistrate to direct any person to give measurements for the purpose of investigation or proceedings under the CrPC. He submitted that consent is not a condition precedent under Section 5, and that DNA profiling is the only scientifically precise means of establishing the biological identity of the children.

Opposite parties, represented by Mr. Somesh Panja, opposed the prayer on grounds of privacy, bodily autonomy and the emotional welfare of the child. They argued that compelling DNA testing after more than two years would cause serious psychological consequences. They contended that the investigating agency could instead rely on hospital records, identification marks and medical documentation. Citing the Supreme Court's decision in R. Rajendran v. Kamar Nishand (AIR 2025 SC 5605), they argued that DNA testing should not ordinarily be directed during investigation where documentary evidence is available.

The Court's Legal Framework: Sections 5 and 6 of the Identification Act

The High Court examined the scope of the Criminal Procedure (Identification) Act, 2022 in detail. Section 3 of the Act requires certain categories of persons — convicts, those ordered to furnish security, and arrested persons — to allow their measurements to be taken. Section 5 confers a wider power on the Magistrate to direct "any person" to give measurements if it is expedient for any investigation or proceeding. Section 6 provides consequences for resistance or refusal to comply.

The court held that the Magistrate's rejection solely on the ground of non-consent was erroneous. "Consent, by itself, cannot be regarded as an absolute condition precedent to the exercise of jurisdiction under Section 5," the court observed, noting that Section 6 itself contemplates consequences for refusal.

However, the court cautioned that the power under Section 5 is not to be exercised mechanically. "The Magistrate must independently satisfy himself that obtaining such measurement is expedient in the facts and circumstances of the particular case," the court stated, adding that where the person does not fall under Section 3, the Magistrate must exercise corresponding care.

Balancing Biological Identity with Privacy and Child Welfare

The court acknowledged the competing interests at play. On one hand, the children had developed strong psychological bonds with the families who raised them over three years. On the other hand, the interest of a child in knowing his or her true biological identity is a significant consideration.

"If the children were, in fact, exchanged at birth, allowing the uncertainty to continue indefinitely may result in two children continuing to grow up with families who are not their biological families, while the truth remains capable of being scientifically established," the court observed.

Referring to the Supreme Court's decision in Chaturbhuj Pradhan v. Amar Pradhan (2026 SCC OnLine SC 994), the court noted that the right to privacy must be balanced against the child's legitimate interest in a definitive answer concerning biological identity.

What the Court Ordered: Limited DNA Testing, No Compulsion

The court issued the following directions:

  • The petitioner, her husband, and the child in their custody shall undergo a repeat DNA examination at the State Forensic Science Laboratory, Government of West Bengal.
  • The child in the custody of the opposite parties shall also undergo DNA examination for the limited purpose of determining biological relationship.
  • The opposite parties (the other couple) may voluntarily undergo DNA testing at the same laboratory, but the investigating agency shall not compel them to do so, having regard to their privacy and bodily autonomy.
  • The DNA examination shall be confined strictly to determining biological relationship.
  • The samples shall, as far as practicable, be collected from the children's respective residences.
  • The Director of the State Forensic Science Laboratory shall complete the examinations within ten days of communication of the order.

'DNA Examination Should Not Be Regarded as End of Child-Welfare Inquiry'

The court made it clear that even if the DNA results confirm an exchange, that alone would not warrant immediate transfer of custody . "The DNA examination, therefore, should not be regarded as the end of the child-welfare inquiry . It would, at best, establish a biological fact which may necessitate further consideration of the welfare, identity, and future care of the children," the court observed.

The court directed that the matter be listed on October 15, 2026 under the heading "To Be Mentioned," and expressly clarified that nothing in the order shall be construed as a direction for transfer or exchange of custody based solely on the DNA result.