The investigation into the death of Ketan Agarwal has reached a critical legal impasse as primary suspects Siya Goyal and Chetan have formally declined to undergo polygraph examinations. Following the rejection of a police custody plea by a local court, the accused have been remanded to judicial custody, shifting the focus of the probe toward digital forensics and potential third-party involvement. While investigators view the polygraph as a necessary tool to resolve inconsistencies in witness statements, the refusal underscores the limited evidentiary weight such tests hold within the Indian judicial system.
The Legal Reality of Polygraph Tests in India
In the Siya-Ketan case, the request for a polygraph test highlights a common, albeit contentious, investigative strategy. Under Indian law, the use of polygraphs, brain mapping, and narco-analysis is strictly governed by the landmark 2010 Supreme Court judgment in Selvi v. State of Karnataka. The court ruled that involuntary administration of these tests violates the right against self-incrimination guaranteed under Article 20(3) of the Constitution.
Because the test requires the subject’s consent, the refusal by Goyal and her co-accused is legally protected. Even when consent is granted, the results are rarely admissible as substantive evidence in court. Instead, they serve primarily as investigative leads. As noted by legal experts, the science behind the “lie detector” remains highly disputed. The American Psychological Association has long maintained that there is little evidence that polygraph tests can accurately detect lies, noting that the physiological indicators measured are far too ambiguous to serve as a reliable basis for criminal conviction.
Digital Forensics and the ‘Secret Chat’ Narrative
With the polygraph off the table, the investigation has pivoted toward the digital footprints left by the suspects. Reports indicate that investigators have uncovered “secret chats” involving coded language and emojis, which are now being analyzed to reconstruct the timeline of events leading to Agarwal’s death. This shift reflects a broader trend in criminal investigations where the reliance on traditional interrogation techniques is being eclipsed by the forensic analysis of encrypted communications.
The Information Technology Act provides the framework for how such electronic evidence is handled in Indian courts. However, the challenge for police remains the authentication of these digital artifacts. Without a confession or corroborating physical evidence, the prosecution must rely on a chain of circumstantial evidence, including the suspects’ movements near the Lohagad site and their digital interactions, to build a case that meets the “beyond reasonable doubt” threshold.
The Growing Debate Over ‘Dark Tourism’ Sites
The investigation has also drawn public attention to the risks associated with “dark tourism”—the practice of visiting sites associated with death, tragedy, or historical trauma. The location linked to the Ketan Agarwal case has sparked a wider conversation about the safety of secluded, unmonitored heritage sites. Local authorities are currently under pressure to increase surveillance in these areas, as the case has highlighted how such locations can become flashpoints for criminal activity when left without administrative oversight.
According to the Ministry of Tourism, while India has invested heavily in promoting heritage circuits, the management of peripheral or remote sites often lacks the security infrastructure found at major tourist hubs. The National Crime Records Bureau notes that while specific statistics on crimes at tourism sites are not always siloed, the vulnerability of remote, unmanned locations remains a consistent factor in investigations involving foul play in isolated environments. The shift to judicial remand suggests that the court is currently satisfied that further police interrogation is not immediately necessary, signaling that the investigation must now rely on documented evidence rather than the pressure of custodial questioning.
What Happens Next in the Investigation?
The rejection of the polygraph and the move to judicial custody mean the police must now finalize their charge sheet based on the evidence already collected. For the prosecution, the “third-person” theory—a narrative hinted at by investigators—must be substantiated by more than just the absence of a confession from the primary suspects. If the digital evidence does not definitively link a third party to the scene, the case may remain centered on the original accused.
As the legal process unfolds, the case serves as a reminder of the tension between modern forensic aspirations and the constitutional protections afforded to suspects in India. Whether the digital evidence will provide the “smoking gun” that the polygraph could not remains the central question for the prosecution. How do you view the balance between the state’s need for investigative tools and the individual’s right to refuse them? Share your thoughts on the evolving role of forensic technology in the modern courtroom.
