Patna: Nand Gopal Pandey alias Fauji, the prime accused in the murder of Ranvir Sena chief Brahmeshwar Singh, has been arrested in Bihar's Jamui district, police said on Thursday. "Fauji Pandey was arrested with arms from a construction site by a special police team on Wednesday night," a district police official said. The arrest took place four years after Brahmeshwar Singh was shot dead in Ara town while on a morning walk. Fauji was carrying a reward of Rs.50,000 on his head and faced over a dozen criminal charges including those of murder, extortion and abduction. "We will interrogate Fauji to know more about motive behind the killing and other people's involvement," a police officer said. Brahmeshwar Singh founded the Ranvir Sena, an upper caste private militia that had been blamed for many killings, mainly the poor. The police had filed a chargesheet against six people for the murder.