Manhattan Serial Murders

A series of murders occurring in Manhattan from March 11th to June of 1982. The victims number a staggering 25, ranging from ordinary citizens to criminals and politicians. Most of the victims were found in horrific condition, primarily showing signs of firearms. Who on earth is committing these acts?

One peculiarity is that several victims testified that the perpetrator was wearing a police uniform before they died, which has somewhat damaged the credibility and image of the police in Manhattan. There was even a case where an ordinary resident mistook an innocent police officer for the culprit and killed him...