Ramesh Chandra Sharma (42) who took voluntary retirement from the BSF in 2013, lives at Majra Dabas and works as a security officer at a private construction company.
"Ramesh was returning from work last night on his bike when he was intercepted by two men on a scooty in Rohini Sector 24. When he resisted to their robbery attempt one of the duo whipped out a pistol and fired at him. He retaliated using his licensed pistol and the shot hit the robber in the chest," said a police officer.
A case has been registered and efforts are on to identify the killed robber, he added.