MANSEHRA: Police have arrested an alleged murderer of Director Orangi Pilot Project, karachi Parveen Rehman from Mansehra.DSP Zulfiqar Jaddon said accused Ahmed Khan aka Pappu Shah aka Kashmiri was apprehended with the assistance of intelligence agencies.Jaddon further said Ahmed Khan belongs to a political party and was wanted to Karachi police.Further investigation was underway, the police officer added.Parveen Rehman was killed in 2013 in Karachi.