A jailed man has apparently confessed to shooting Tupac Shakur in 1994, claiming he was paid to rob and shoot the rapper outside a studio in Manhattan.

The “confession” came to light on the eve of Tupac 40th birthday, which would have been today. According to reports, New York police are now investigating.

Yesterday, hip-hop website AllHipHop.com published a report in which life Issac Dexter, – who is serving life in prison for murder, robbery and other offenses – claimed he was paid $2,500 dollars by James “Jimmy Henchman” Rosemond to rob Tupac.

In an open letter of confession, Dexter wrote:

“I want to apologize to his family [Tupac Shakur] and for the mistake I did for that sucker [Jimmy Henchman].

“I am trying to clean it up to give [Tupac’s and Biggie’s] mothers some closure.

“He [Rosemond] gave me $2,500, plus all the jewelry I took, except for one ring, which he wanted for himself.

“It was the biggest of the two diamond rings that we took. He said he wanted to put the stone in a new setting for his girlfriend at the time, Synthia Ried. I still have as proof the chain that we took that night in the robbery.”

In 994, Tupac Shakur was shot (but not killed) multiple times as he entered the lobby of a Manhattan studio which was also occupied by other Notorious B.I.G. and Bad Boy head Diddy.

Until his death, Tupac claimed that Czar Entertainment founder Jimmy Henchman was behind the ambush.

The 1994 shooting was the start of a feud that led to the murders of both Tupac and Notorious B.I.G.

 Tupac shot and killed in 1996, while B.I.G. was gunned down in Los Angeles six months later, in March 1997.

Henchman has long denied any involvement in the shooting.

“If the government is relying on informants like Winston “Winnie” Harris, a convicted drug dealer and Jamaican deportee, who came to me and motioned via hand signal that he was forced to wear a wire and begged me to skip town or Dexter Isaac who is serving life in prison plus 30 years then I’m sure I will not be offered a fair trial” Henchman wrote in a statement.