Sometimes there are witnesses – the man who saw the victim cuffed at a police station before his body was found trussed and tortured on a highway, the woman who knew the name of the cop who killed her brother, the friend who was standing at the street corner when the teenager was abducted. Very few will speak on the record. They talk about masked men wandering past their houses at night. They talk about children at risk. Sometimes they will say the dead deserved to be killed - You will be safe, for as long as you behave.