There is reportedly a tape of the fracas that led to the shooting death of Busta Rhymes' bodyguard outside a New York video studio.
Although Rhymes, 50 Cent, DMX and Mary J. Blige were all believed to be nearby at the time of the shooting, New York police have been stymied by a lack of witnesses.
A source told the Daily News the argument began when members of 50 Cent's G-Unit crew were told they could not participate in the video shoot for Rhymes' "Touch It (Remix)."
The audiotape, which captures someone calling Rhymes a "bitch," is reportedly being shopped to media for $50,000, but has not been offered to investigators, the newspaper said.
New York Police Commissioner Raymond Kelly has threatened to call a grand jury investigation and force witnesses to testify.