Shyam Sunder alias Sunderiya jumped parole to escape in 2010 and Special Operation Group of the state police, which was probing the case, announced a Rs 50,000 reward on his arrest, an ATS spokesman said.
Shyam was the main accused in the Virendra Nayngali murder case of 2009 and before fleeing he had opened fire in Rajgarh town in 2010.
After Shyam's arrest he was being brought to Jaipur for interrogation, the spokesman said.