The beef between James "Jimmy Henchman" Rosemond and 50 Cent's G-Unit crew could have been squashed if both parties would've listened to Diddy, a prosecution witness revealed in Manhattan Federal Court Wednesday (Feb. 12). 

Rosemond is on trial for ordering the murder of G-Unit associate Lowell Fletcher. On the stand yesterday, the 40-year-old's former cocaine runner, Khalil Abdullah, detailed a secret meeting between the Czar Entertainment founder and 50. Abdullah and Fif's manager, Chris Lighty — who died of an apparent suicide in 2012 — were on hand for what turned into another heated run-in between the opposing sides. 

According to Abdullah, the Violator Management founder attacked Rosemond. "Chris ended up mushing Rosemond in the face," he said. "Puff jumped in between them and broke it up." 

The peace-making gesture eventually gave way to yet another boiling point in 2007, when G-Unit member Tony Yayo allegedly roughed up Rosemond's teen son. Reportedly, Rosemond told Abdullah to have Lighty shot in the leg as retaliation for Yayo slapping the boy, but the plan never came into fruition.

Rosemond later hired a gunman to kill Fletcher, Abdullah asserted, referencing a conversation he had with the convicted drug kingpin. Prosecutors allege that Fletcher was low on the G-Unit totem pole and therefore an easier target. His shooting death added another bloody chapter to a clash that started over Rosemond's old client Game's feud with his onetime G-Unit colleagues.

Fletcher was gunned down on a Bronx street corner in 2009. He was lured to the location by Brian "Slim" McLeod, who was hired by Rosemond and previously served jail time with Fletcher. Another accomplice, Derrick Grant, pulled the trigger. "Slim's man came out of nowhere and clapped the dude up," Abdullah, who wasn't physically on hand at the murder scene, said. 

Grant and McLeod were paid with a $30,000 brick of cocaine for their help, and according to Abdullah, Rosemond was in Miami at the time of the murder.

During Wednesday's cross examination, Rosemond's attorney, Bruce Maffeo, attempted to poke holes in Abdullah's credibility. In court earlier in the week, Maffeo warned jurors about prosecution witnesses potentially lying on the stand in return for leniency. 

Abdullah, is serving eight years for his roll in the multi-million dollar drug trafficking case that put Rosemond behind bars for life. He could walk from custody sooner for testifying against his former boss.

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(Photos from left: Moses Robinson/Getty Images for BET, Jason Merritt/Getty Images, Johnny Nunez/Wire Image)