The Supreme Court observed that while expert evidence may not always require corroboration, courts must exercise caution when relying on expert testimony particularly the handwriting expert due to the imperfect nature of the science of identification of handwriting.
The bench comprising Justices Vikram Nath and Sandeep Mehta heard the case where the Appellant challenged his conviction under Sections 120B (criminal conspiracy), 468 (forgery for the purpose of cheating), and 471 (using a forged document as genuine) of the Indian Penal Code (IPC). The case involved the fabrication of a mark sheet used for admission to an MBBS course.
The prosecution relied on the testimony of a handwriting expert to prove that the handwriting on the postal cover matched the appellant's. However, the original postal cover was never exhibited as evidence, and the prosecution failed to prove its existence.
The Appellant challenged his conviction, arguing that the expert's evidence report cannot be relied upon in the absence of the original postal cover.
Finding merit in the Appellant's contention, the judgment authored by Justice Mehta noted that the prosecution failed to prove the existence of the disputed postal cover, which was central to the case.
The court cited the landmark case of Murari Lal v. State of M.P. (1980) 1 SCC 704, which established principles for assessing expert evidence under Section 45 of the Evidence Act. It held that while expert testimony is not inherently unreliable, it must be carefully scrutinized, with the reasoning behind the opinion thoroughly examined. Further, it held that corroboration may be necessary depending on the case, but there is no strict rule requiring expert evidence to always be corroborated.