UPDATED: Since publishing this story, Allhiphop.com has changed the wording of its report, softening the original text that initially stated that Isaac admitted to “shooting” Shakur, to now admitting “to being involved.” Read the whole story here.

Allhiphop.com reports that last night, on the eve of what would have been seminal rapper Tupac Shakur’s 40th birthday, an inmate named Dexter Isaac came forward confessing to his involvement in the 1994 robbery and shooting of the rap legend, which happened outside of Manhattan’s Quad Studios.

AllHipHop published Dexter’s letter, in which he says, “James Rosemond [aka Jimmy Henchman, music industry figure and currently the manager of the Game/president of Czar Entertainment] hired me to rob 2Pac Shakur at the Quad Studio. He gave me $2,500, plus all the jewelry I took, except for one ring, which he wanted for himself.”

The shooting happened in November of that year, when Tupac was entering the lobby of the studio. He was shot five times—twice in the head, twice in the groin and once through the arm—he blamed Sean Combs and Biggie Smalls, whom he saw soon afterward, of setting him up. This sparked a heated feud between Biggie and Tupac, which is believed to have led to both of their eventual deaths.

“Now I’m not going to talk about my friend Biggie’s death or 2Pac’s death, but I would like to give their mothers some closure,” the letter, allegedly from Isaac, continues. “It’s about time that some one did, and I will do so at a different time.”

Isaac is currently serving a life sentence for other charges, and the letter says he’s comfortable going on record with the new information, since the statute of limitations on the case has expired.