KARACHI: Sindh Police arrested a rental target killer during a raid. The killer has confessed to killing four persons on Sunday. Police officials said that the suspect, Shoaib, murdered a traffic police officer for charging fine on violation of traffic law. He was also involved in murder of an official of Special Security Unit, police said. The suspect has confessed to killing a woman after breaking into her house in exchange of just Rs5, 000. He has also killed sector in-charge of a political party. The police officials said that the suspect has already served terms in jail four times, while he is wanted in four other criminal cases as well. Interrogation from Shoaib is underway which is likely to lead towards more confessions.