New Delhi, Sept. 23 -- A 65-year-old woman was found dead in a decomposed state and her 70-year-old husband, a retired music teacher at a school, was lying critically ill beside her in their Jamia Nagar flat late Sunday night, after police broke into the locked home following frantic calls from relatives who had been unable to reach the couple for days. Their 50-year-old son, described by police as "mentally challenged" and with a history of psychiatric illness, was found sitting outside the bedroom and later taken to the Institute of Human Behaviour and Allied Sciences (IHBAS). According to police, the incident came to light when a PCR call was received around 11.30pm on Sunday, from the woman's brother and sister-in-law, who said they had...