Patna:The Special Task Force of Bihar Police on Monday arrested Mukesh Pathak, a dreaded criminal, from Ramgarh in neighbouring Jharkhand, police said. Pathak is the prime accused in the killing of two engineers of a private construction company. "It is a big catch for the police as Pathak was absconding for months. He will be brought here and interrogated by a team of police officials," Additional Director General of police headquarters Sunil Kumar said. He said the police will take Pathak on remand for interrogation and file a chargesheet against him soon to ensure a speedy trial. According to police, Pathak was behind the killing of two engineers -- Brajesh Kumar and Mukesh Kumar -- on December 26, 2015 by two motorcycle-borne assailants. The engineers were killed for not paying extortion money. An official of construction company BSC-C&C Joint Venture Ltd had said that Pathak, who works as a 'shooter' for gangster Santosh Jha, was demanding the money since August. The official said Pathak had called several times between December 16 and 20, 2015. A police probe indicated the involvement of Santosh Jha's gang. Jha is currently lodged in Gaya Central Jail. Police said there are 16 serious criminal cases against Pathak.