Chandigarh, Oct. 3 -- A school friend allegedly introduced the teenager accused of killing his father, a head constable with the UT Police, to an illegal arms dealer in Haridwar, police said, adding that the friend has been arrested.

Identified as Lakshya , 20, of Ramdarbar, he was arrested with a country-made pistol on Thursday night. This is the third arrest in case.

Police said Lakshya and the main accused, Armaan Singh, had studied at the same private school in Sector 45. The pistol recovered from Lakshya's possession was of a make similar to the one allegedly used by Armaan to shoot dead head constable Nitin Singh on September 25. He was produced in court and sent to judicial custody.

According to police officials in the know of t...