The accused had been identified as Sriom and was wanted in four cases in Haryana and Delhi.
"Based on specific input, Sriom was nabbed from Sector 18 in Dwarka along with a robbed car. He has confessed to his crimes," said Deputy CP (South-West) Suman Goyal.
During interrogation it was revealed that he and his associate had allegedly killed one Abhinav Verma under Palam village police station area, police said, adding he was also involved in a dacoity case in Mundka.