Sources say 22-year-old William Williams entered the plea on Tuesday. He had faced a murder trial. Prosecutors say he'll be sentenced to 21 years in prison.
DJ Megatron was shot in the chest while walking to a store near his Staten Island home in March of 2011.
The 32-year-old disc jockey worked on BET's "106 & Park" music countdown series. He also did on-camera work for the show and for BET's website. His given name was Corey McGriff.
A second man, Richard Cromwell, was also charged in the shooting and is due in court on Feb. 27. His attorney has said he's not guilty.
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