The police have arrested a 25-year-old female, who according to them had killed Kumar on July 20.
According to the police, Kumar man used to blackmail the 25-year-old after filming her and himself naked.
The woman alleged that she had approached Kumar two years back seeking a job and on the pretext of helping her, Kumar used to exploit her physically.
According to the police, the woman killed Kumar in vengeance.
READ:Retired income tax official murdered at home, TV and cash stolen
The residents were shown a captured image of the suspect as well as the CCTV footage recovered from a camera installed at the exit gate of the apartment complex, a police source said.
The suspect was not noticed while coming inside but was clearly captured while exiting the apartment complex from gate number three, carrying a television which was stolen from victim, Vijaykumar’s flat, he said.
Residents of the apartment complex said policemen asked them to identify the suspect through her captured image and CCTV footage.
Kumar, who had retired from CGHS, was stabbed to death on Wednesday afternoon at his flat on the third floor of Samachar Apartments in Mayur Vihar area. He lived at the third floor of the building.
The incident came to light when Kumar didn’t respond to the calls of his daughter, Ambily, who works with Rajya Sabha TV and stays in the same society. His son too is a journalist in Dubai.
After reaching home, Ambily found Kumar’s body lying in a pool of blood, in a semi-nude condition under a mattress in the bedroom of the flat, with multiple injuries on his body.
The police had on Wednesday said that the assailants were known to Kumar as the entry seemed friendly. The police also found tea cups in the bedroom and no signs of ransacking. The police also said that robbery was not the main intention.
However, a television set has gone missing from the flat of the retired official who stayed with his wife, Vasundhra, 60, who works in the Income Tax department.
Kumar had moved to Delhi four months ago and was to turn 65 on Friday.
This was the fourth incident of murder of senior citizens in the national capital within a fortnight.
The role of domestic helps was found in three murders of senior citizens in Kalkaji, Paschim Vihar and Dwarka.