Willie D. Clark faces 39 counts, including first-degree murder. His plea hearing was postponed until Feb. 20 because his attorneys wanted more time to review evidence.
Williams was shot after leaving a Denver nightclub on New Year's Day 2007. The indictment says Williams and Clark were at the club with separate groups that exchanged taunts before Williams and his friends left in a rented limousine.
A witness told investigators that Clark was driving an SUV when he caught up with Williams' limo and fired into it.
The 25-year-old Clark also was indicted last month in an unrelated shooting death.
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