Accused, Muni Raj Chauhan, who was arrested yesterday, was using a special software in his mobile phone with the help of which he could hack the phone numbers of senior officers, police said.
A businessman, Saurabh Mathur, had filed a police complaint, alleging that unidentified persons had been demanding Rs 50,000 from him using different phone numbers, Superintendent of Police Rajesh Krishna said.
After the complaint, police laid a trap and on their advice Mathur put the money at the spot where he was told by the callers.