The Denver Post reported on its Web site Wednesday that Joshua Grantham testified that he was reading a magazine that had a tribute to Williams when Willie Clark allegedly made the comment. The 26-year-old is on trial on first-degree murder and other charges. His attorneys argue he is innocent and the scapegoat in the case.
Grantham was serving a 15-year sentence for aggravated robbery in Denver when he was in jail with Clark.
Authorities say Williams was in a limousine when he was shot by someone in an SUV on New Year's Day 2007. Williams had been at a Denver nightclub where an altercation occurred.