India, April 25 -- A chilling mix of aggression and emotional detachment has stunned investigators in the rape and murder of an IRS officer's daughter in southeast Delhi, with the 19-year-old accused, Rahul Meena, showing no visible remorse and casually justifying his actions during interrogation.

Police said Meena remained calm while recounting the sequence of events and repeatedly framed the crime as a consequence of his demand for money being refused.

"I don't regret committing the theft, but I should not have killed her. It just happened," he told investigators, according to a senior officer present during questioning.

His statements, coupled with his lack of emotional response, have prompted Delhi Police to order a psychological a...