A second man who led the fatal attack on a police officer in Bulandshahr, Uttar Pradesh, during the mob violence of December 3 has been arrested. The police said the man, identified as Kalua, had attacked Inspector Subodh Kumar Singh with an axe, chopping off a couple of his fingers and then inflicting a head wound. After that, the officer was shot. Prashant Nutt, the man who allegedly pulled the trigger, was arrested on December 28.