Reports surfaced Wednesday night that a prisoner confessed to being involved in the 1994 robbery of rapper Tupac Shakur, according to a statement posted online.

The announcement came a day before it was supposed to be the rappers 40th birthday.

The statement, which was posted on AllHipHop.com, Dexter Isaac, who is serving a life sentence for unrelated charges, confessed that he was paid $2,500 by James Rosemond to rob Tupac outside Quad Studio in New York City.

Tupac was shot during this robbery, but Isaac does not identify who the shooter was.  

MTV reported that before his death, Tupac suspected Rosemond was trouble.

In his song, Against All Odds, Tupac raps, And did I mention, promised a pay back. Jimmy Henchman, in due time/ I know you [expletive] is lisetnin'. The world is mind / Set me up, wet me up, [expletive] stuck me up / Heard the guns bust, but your tricks never shut me up.

Rosemond is a rap manager who is also known as Jimmy Henchman. Federal authorities are currently after him for his alleged involvement in a drug trafficking ring.