LUCKNOW, July 31 -- The wife of a senior CB-CID officer allegedly attempted to smother her autistic son a day before dying by suicide at their official residence in Reserve Police Lines here. A day after the incident was reported, footage of a CCTV camera installed in the room went viral on Thursday, bringing to the fore the sequence of events, officials said.

Nearly a minute-long footage from July 29 shows the woman purportedly attempting to smother her 12-year-old son. Another child is seen playing in the room.

According to police sources, the officer had installed surveillance cameras inside the residence and was watching the footage on his mobile phone at the time of the incident. The couple reportedly entered into an argument after...