An MS-13 gang member who admitted to killing a teenager in Central Islip was sentenced Thursday to 27 years in prison.

Federal prosecutors say William Castellanos, of Brentwood, fatally shot 16-year-old Jonathan Cardona-Hernandez on Nicoll Avenue in June 2015.

The victim was believed to be part of a rival gang. He was shot at least 10 times, and his body was found in the street.

Three others were also charged in connection with the teen's slaying.