According to The New York Post, National Fire claims 50 Cent, born Curtis Jackson, waited more than 12 months to report the assault, which effectively nullified the rapper's coverage.
During the interview, Xzulu allegedly made an off-color remark about a cell-phone ear piece being worn by The Game's manager, Jimmy "Henchmen" Rosemond.
Shortly after the interview was over, police said a group of men confronted the DJ and punched and kicked Xzulu, causing serious internal injuries.
In April 2005, another man named Kwasi Jones came forward and claimed that he was beat by the pack of men the same evening as well.
He also claimed the labels were negligent for releasing several remixes to Game's "Hate It or Love It" single which featured 50 Cent.
On the song, The Game rapped: "I'm rap's MVP/Don't make me remind y'all what happened in D.C."
While charges against The Game were eventually dropped, Rosemond was found guilty of misdemeanor assault in Feb. 2006.
Rosemond was later sentenced to three years of unsupervised probation and fined $2,500 for his role in the incident.