Police arrested a man who allegedly killed the boyfriend of his estranged wife outside a Centereach apartment Wednesday.

Cops found Keith Amato, 30, Thursday morning in his car in Ronkonkoma. He allegedly broke into the apartment shared by his wife and her boyfriend. A fight between Amato and Christopher Lulenski then spilled outside the apartment, according to police.

Amato allegedly then beat Lulenski to death with a baseball bat and drove off. Lulenski?s body was found in his neighbor?s driveway.

Amato was taken to the hospital because police say he had suffered a drug overdose.