New Delhi: A 25-year-old woman has been arrested for the murder of a senior citizen at his flat in Samachar Apartments in east Delhi's Mayur Vihar, police said on Saturday. Investigators said the woman was arrested on the basis of circumstantial evidence and with the help of CCTV footage. The woman informed police that she approached the victim two years ago for a job but the elderly man allegedly sexually exploited her and filmed her in the nude. The woman has confessed to the crime and told police that she stabbed him to death to avenge sexual exploitation. A police officer said that 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. 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 Kumar's flat, the officer said. Residents of the apartment complex said policemen asked them to identify the suspect through her captured image and CCTV footage in which she was seen wearing blue jeans and a T-shirt. The body of Vijay Kumar, 65, with stab wounds was found by his daughter in his third floor flat in Samachar Apartments. The incident came to light when Kumar didn't respond to his daughter Ambily's call. She rushed to his flat and found him lying in a pool of blood in his bedroom and raised an alarm. According to police, Kumar -- who had retired from the Central Government Health Scheme (CGHS) -- was alone when the murder took place. Kumar's wife Vasundhra, 60, works in the Income Tax Office here.