New Delhi, January 17:

Private detective Vijay Dhawan, key accused in Samajwadi Party leader Amar Singh’s phone tapping case, was arrested today when he walked into a Delhi police station to surrender.

Delhi Police had released Dhawan’s photograph six days ago in the belief that he was the brain behind tapping Amar Singh’s phone, an issue that has escalated into a huge controversy since it came to light in late December.

He is alleged to have forged a letter from Ranjit Narayan, joint commissioner of police (crime branch), and R Narayan Swamy, principal secretary (home), Delhi.

“Dhawan’s interrogation will solve a lot of loose ends,” said a senior police official.

He will be presented in court where police will demand his custody for interrogation.

According to police sources, the plan to tap Amar Singh’s phone was honed three months ago when the three private detectives, Bhupendra Kumar, Vijay Dhawan alias Vijay Grover and Anurag Singh, met at an Association of Private Detectives of India event. Amar Singh has been accusing Congress chief Sonia Gandhi of instigating the phone tap through private parties. Union Home Secretary VK Duggal had said that there was no political motive behind the phone tapping.