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 been alerted by the couple's daughter in Hong Kong after she failed to contact her parents for nearly a week. When these relatives tried to enter the home on Sunday, the son allegedly refused to open the door despite responding to their calls. "Seeing the sensitivity of the case, the SHO and ACP rushed to the spot where the family members were present. The door was found locked from inside. We broke open the door to get inside. In one of the bedrooms, we found a dead body on the bed and her husband was found lying in a critical and fragile condition. The staff immediately rushed him to AIIMS as he needed medical care. Their son was sitting outside the bedroom," said Hemant Tiwari, deputy commissioner of police (southeast). According to police, the couple lived in Queen Apartments in southeast Delhi's Jamia Nagar. The man, a retired music teacher at a school nearby, remains hospitalised in fragile condition, said the DCP. His wife's body was sent for autopsy, with police noting that it bore no external injuries but was "highly decomposed," indicating that she may have died several days earlier. During questioning, police said the son gave them inconsistent responses. "He has a history of psychiatric illness. He first said his mother and father were sleeping. He later admitted that he confined himself with his parents inside the home for four to five days without food. We suspect he did not feed them either," said a senior officer. Police have not yet registered an FIR, pending the autopsy report....