Evidence & Forensic Investigation, Clearly Explained

A dying declaration is not automatically inadmissible merely because it was not recorded by a Magistrate or because the maker later died. The court examines whether the maker was mentally fit, whether the statement was voluntary, clear and reliable, and whether tutoring, contradictions or suspicious circumstances exist. An unreliable declaration may be rejected; a trustworthy one can sometimes support conviction by itself.

Yes. The law does not require a fixed number of witnesses. Conviction can rest on one wholly reliable witness, while several unreliable witnesses do not become stronger merely by number. The court evaluates credibility, consistency, opportunity to observe, cross-examination and corroboration where prudence or law requires it.

Conduct before or after an event may be relevant when it is connected with a fact in issue. Prior threats, preparation, flight, concealment or attempts to destroy evidence can be considered with the rest of the record, but conduct alone does not automatically prove guilt and may have innocent explanations.

Yes, but this alone cannot be taken as evidence. This is seen in conjunction with other evidence (e.g. CCTV, testimony). The Supreme Court has said that location data alone is not enough to convict a person.

For legacy proceedings, Section 65B of the Indian Evidence Act governed certificates for many computer outputs. Under the Bharatiya Sakshya Adhiniyam, electronic-record admissibility and certificates are addressed by the current provisions, including Section 63. Preserve the source device, metadata and chain of custody; the exact certificate depends on how the record is produced.

Admissibility of a recorded call depends on relevance, authenticity, identification of voices, lawful acquisition, completeness and privacy considerations. There is no universal rule that every participant recording is automatically admissible or that every third-party recording merely needs consent. Obtain case-specific advice before recording, publishing or relying on a call.

If the expert bases his opinion on personal guesswork (such as "I think that...") rather than based on scientific facts and data, the court may reject that opinion.

Delay in an FSL report does not by itself create a presumption of tampering. The court examines the explanation, seals, sampling, storage, forwarding records and complete chain of custody. Unexplained delay combined with custody defects may weaken reliability, while a documented intact chain may preserve the report’s value.

Yes, you can seek permission from the court through your lawyer to call an expert (eg – doctor, forensic expert, handwriting expert) as a witness.

Yes, you can prove that you were somewhere else at the time of the crime (Alibi Defense), or there is no evidence against you. “Benefit of doubt” always goes to the accused.

If the chain of evidence is broken (e.g. breaking of seal, change of witnesses, or tampering of documents), the court may reject that evidence, thereby weakening the entire case.

Yes, a witness can change his or her statement (called a "Hostile" or "Turncoat" witness). But the court considers the statement of such a witness very carefully and corroborates it with other evidence.

A party may request summons for a relevant witness and, at the proper stage, may also produce a permitted witness in accordance with court procedure. Lawyers may explain the process and ask a witness to tell the truth, but coaching or dictating testimony is improper and can damage the case.

Causing disappearance of evidence or giving false information to screen an offender is punishable under the applicable penal law. The sentencing range is linked to the seriousness of the underlying offence and is not universally capped at three years. Destruction may also lead to adverse evidentiary consequences and other charges.

A defence witness is ordinarily presented at the defence-evidence stage or with the court’s permission later. The court considers relevance, prior disclosure where required, prejudice, delay and whether the request is genuine. A witness cannot be introduced at any time as an absolute right.

Preserve original devices, screenshots, metadata, certificates, date-times and sources. Without authentication, electronic material may become vulnerable.

Original documents, signature specimen, expert report, witnesses, bank records and proof of loss incurred due to use of the document are required.