A person of interest who had turned himself in was released last Wednesday, personnel at the Spanish Town Police Station have said.
The body of Constable Kevin 'Metro' Tulloch, who was attached to the Mobile Reserve, was found near a rail track in Irish Pen, St Catherine, about 6:30 a.m.
There were gunshot wounds to the upper body. The policeman's gun was also stolen, investigators said. He is the third cop slain this year.