By Selim Algar
New York Post
NEW YORK — The ex-cop who yelled "gun" before a Long Island police officer was killed in a "friendly fire" shooting is a retired NYPD veteran who has an annoying habit of listening to scanners and racing to locations where police are called, sources said yesterday.
John Carafella, 58 - a former Emergency Service Unit sergeant out of East New York - has spent his three-year retirement nosing around crime scenes and offering unwanted help, the sources said.
Retiree who yelled 'Gun' has 'annoying habit' of visiting crime scenes