One of the members of the deadly MS-13 gang who pleaded guilty to taking part in a grisly 2017 ambush killing in which four teens were mutilated and killed has been given a half-century prison sentence.

Freiry Martinez, 18, was handed the 50-year sentence on Monday before Judge Joseph Bianco of the federal court on Long Island.

Martinez was 15 years old when he and other MS-13 members surrounded five teens in a Central Islip community park on April 11, 2017 after two of their female associates after they lured the unsuspecting victims there and attacked them.

The marauders killed Justin Llivicura, 16; and Michael Banegas, Jefferson Villalobos and Jorge Tigre, who were all 18 years old. The fifth person in their group managed to escape the carnage.

Days after the murders, Martinez, who also goes by “Discreto” and “Sovietico,” fled New York and holed up in Virginia and Maryland.

While he was on the lam, Martinez stayed active with MS-13 by selling drugs, committing assaults and taking part in armed robberies at check-cashing establishments, according to a news release from the U.S. Attorney’s Office in Brooklyn.

“It is my hope that today’s sentence brings some measure of closure and a sense of justice for the family members of the four victims, whose young lives were senselessly cut short by Martinez and his fellow MS-13 members,” U.S. Attorney Richard Donoghue said in the release.