A reputed member of the Bloods gang from Long Island who goes by “Live Wire” and “Debo” has pleaded guilty to the 2007 drive-by shooting death of a 15-year-old as the boy was leaving an anti-crime rally.

Trendell Walker, 31, has copped to killing Alvin Brothers while the boy was at a “Night Out Against Crime” rally at a park in Bellport on Aug. 7, 2007.

The day prior to the slaying, assailants had assaulted and attempted to rob Walker and he had traveled to Bellport with other Bloods members to get revenge on his attackers, according to the US Attorney’s Office in Brooklyn.

Walker saw Brothers standing with several other youths and opened fire on the group, according to a news release from the office.

“Today’s plea demonstrates the Department’s unwavering commitment to holding accountable gang members like defendant Walker who show complete disregard for human life,” US Attorney Richard Donoghue said in the release.

Walker initially pleaded not guilty to shooting Brothers after he was charged with doing so in 2017, Newsday reported. He had been locked up since 2016

Walker faces a maximum sentence of life in prison.