The widow of NYPD Lieutenant Michael Pigott, who killed himself a week after issuing a fatal command to Taser a mentally disturbed man, is suing the city. Her lawyers are arguing that Police Commissioner Ray Kelly and NYPD spokesman Paul Browne contributed to his suicide by making him a scapegoat for the Sept. 24, 2008 incident, in which a naked bipolar man fell one story to his death after being Tasered. Court papers obtained by the Post argue that public comments made by the NYPD's top brass "caused Michael Pigott to become humiliated, distraught, depressed, and caused him to commit suicide."