Chandigarh, Dec. 10 -- Having languished without leads for nearly two years, the probe into the November 2021 murder of Panjab University professor BB Goyal's wife saw its first real breakthrough in late 2023, when their daughter's polygraph test showed deceptive responses to crucial questions.

Investigators describe this as the "turning point" that shifted suspicion firmly onto Goyal. With no physical evidence to lean on, the anomalies in her test prompted police to pursue Goyal's Brain Electrical Oscillation Signature (BEOS) profiling - an advanced neuro-forensic technique that ultimately led to his arrest on Monday.

Seema Goyal, 60, was found dead in the couple's house on the PU campus in Sector 14 on November 4, 2021. Their only dau...