A member of MS-13 has plead guilty to killing four people in Central Islip.
Police say Freiry Martinez plead guilty in the 2017 murders of Justin Llivicura, Michael Lopez Banegas, Jorge Tigre and Jefferson Villalobos.
The four victims were attacked by multiple MS-13 members with knifes and machetes.
Martinez, who was 15-years-old at the time of the murders, was found last November in Maryland.