S13, E22: There are four seemingly random shootings by a sniper. The first victim is a young mother who is shot while pushing her baby stroller in Chinatown, the second an accountant, the third a construction manager, and a 14-year-old junior high school student. There are notes left too, but they seem to contradict one another. One gives the impression that the perpetrator is psychotic, the others that he's taunting the cops. These supposed random killings have left the city in a state of panic. The Detectives Briscoe (Jerry Orbach) and Green (Jesse L. Martin) get a break when they discover that one of the victims, Charlie Rodriguez, had a serious problem with one of his employees, Herman Capshaw (Ty Burrell).