Roshan Gupta known as Khalla was involved in firing on a police constable at Kakrola Mor picket in 2011, injuring him in the shoulder.
He was declared a proclaimed offender in two cases involving the attack on the policeman, said Ravindra Yadav, Joint Commissioner of Police (Crime Branch).
Roshan extorted protection money from betting operators in west Delhi and roamed around with an armed bodygauard.
His arrested associates include his bodyguard Pradeep and another criminal Rafiullah who was convicted and sentenced to 7-year jail term in a train robbery at New Delhi railway station in 2010, said the officer.
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