Tupac ShakurA man came forward this week, admitting to the 1994 Quad Studios shooting of Tupac Shakur, which he claims was planned and paid for by Jimmy “Henchmen” Rosemond, who has been rumored to have been behind the incident for years.

Former Rosemond associate, Dexter Isaac, wrote to AllHipHop.com on Wednesday (June 15) — from behind bars, where he’s serving a life sentence — confessing to the nearly 17-year-old shooting on what would be the eve of Tupac’s 40th birthday.

He claims that after keeping the secret for so long, he chose to bring it to the light only after Rosemond publicly fingered him as an government informant, in the wake of his drug-trafficking indictment.

“I want to apologize to his family [Tupac Shakur] and for the mistake I did for that sucker [Jimmy Henchman],” Isaac told AHH. “I am trying to clean it up to give [Tupac and Biggie’s] mothers some closure.”

Isaac says Rosemond paid him $2,500 to rob Tupac during an evening in November 1994. Additionally, he was told he could keep all the jewelry he took from the rap superstar, which included two diamond rings and a chain. While Rosemond opted to keep the larger of the two rings, Isaac says he kept the chain as proof of what took place that evening.

Why would he confess to the crime now, you ask? Well, Isaac says that due to the expiration on the statute of limitations, no one can be prosecuted for the robbery/shooting.

Rosemond is currently on the run, dodging a federal indictment for his alleged involvement in a national drug distribution ring. Since the indictment was reported, he has come forward denying the accusations and calling the entire situation “unconstitutional.”

He was expected to turn himself in last month, but apparently, that didn’t happen. Rosemond remains at large.

Isaac was indicted in 1998, and was subsequently sentenced to life in prison for an array of charges, including murder, robbery, fraud, and witness intimidation charges.

At this point, Isaac says he has nothing to gain from confessing to the dated hip-hop mystery. He says he’s just “plain tired of listening to [Rosemond’s] lies.”

At the end of the letter, Isaac even hints at the possible involvement of Diddy, but doesn’t elaborate what he means by it. However, he points at the possibility that Rosemond could “flip on Puffy” to save his own skin, that is, once the Feds catch up to him.

“Jimmy, you and Puffy like to come off all innocent-like, but as the saying goes: you can fool some of the people some of the time, but you cannot foll all the people all of the time,” Issac said.

“Are you going to flip on Puffy when you Feds get you?” he continued. “To save yourself like you have done in the past? Because that’s what a rat does. So in closing, we shall see who the rat is, in the near future.”

Read the letter in its entirety at AllHipHop.com.