EAST ISLIP - ? Cops say another arrest has been made in a deadly East Islip home invasion.

Investigators say 25-year-old Martin Tarpey, of Mattituck, is allegedly the fourth man to be involved in the burglary. Police say four men burst into the home on Adams Street last Wednesday. According to police, a man who lives at the house grabbed his own gun and shot and killed Fred Flock, of Coram.

Two other suspects, Justin Benkov, of Mastic, and Philipe Robinette, of Aquebogue, have also been arrested.