Gurugram, Nov. 13 -- The man accused of killing a Singapore-based executive last week over an argument regarding his dog was allegedly carrying a pistol with intentions to kill the victim and said "Diwali Mubarak" as he shot him, according to police officials and CCTV videos from the area on Thursday.

The accused, Mohan Sharma (42), allegedly shot dead his neighbour Paramjith Dhankhar (43) on November 6 in the stilt parking area of a residential building in Sector 21C. He was arrested a day later from Dealer Chowk in Ballabgarh. He was allegedly motivated by an argument over Sharma's German Shepherd puppy whom he had let defecate in a common area in the building and Dhankhar and his family objected to.

"He was already determined to kill...