Prosecutors argued in court that Jordan and Washington planned the "execution" killing out of revenge after being cut out of a drug deal worth nearly $200,000. They argued the killing was "motivated by greed and by revenge", but Jordan and Washington's lawyers have denied being involved.
A judge overturned Jordan's conviction last year, finding prosecutors failed to prove his motive in the case. Washington has similarly challenged his conviction.
Bryant had been accused of acting as an accomplice to the pair in the killing by helping them slip into the building that housed Mizell's recording studio in Queens, New York.
Prosecutors charged that he opened a back fire door to allow Jordan and Washington entry, and avoid buzzing into the studio so they could ambush Mizell. He initially denied the charges.
But in court on Monday, Bryant acknowledged to a federal magistrate in New York that he knew a gun would be used to shoot the 37-year-old rapper that day and apologized, US media reported.
He did not name others who were involved in the deejay's killing.
