The embattled hip-hop star was a last-minute addition to the bill after his efforts to stage a benefit concert on 17 July for his friend and fellow rapper Capo, who was shot and killed in his native Chicago, Illinois earlier this month (Jul15), and a toddler fatally run over by the same suspect, were blocked by authorities in Illinois.

Instead, he opted to stage his Stop the Violence set at nearby Hammond, Indiana's Craze Fest via hologram from Los Angeles on Saturday (25Jul15).

However, the gig was cut short by local police, who had warned festival organisers they did not want Chief Keef featured at the outdoor event.

Hammond Police Commander Pat Vicari tells the Chicago Tribune, "We spoke to the promoter several times, and they assured us (Chief Keef) would not be performing.

"Later, an officer working the show realised it was being streamed on one of the hip-hop sites, and promoters were warned again they would be shut down."

Concert organiser Alki David has responded to the opposition, blasting the authorities for cancelling a performance aimed at putting a stop to the ongoing gun violence epidemic.

He states: "Shame on the mayor and police chief of Hammond for shutting down a voice that can create positive change in a community in desperate need. And for taking away money that could have gone to help the victims' families.

"This was a legal event and there was no justification to shut it down besides your glaring disregard for the first amendment right to free speech. You've clearly been bullied by the proud Mayor of (Chicago), the Murder Capitol of the U.S., Rahm Emanuel. Mark my words, if you censor us you only make us stronger. Plus we'll be back to sue your a**es."

Chief Keef chose to perform virtually instead of risk returning to the Chicago area, where he has outstanding warrants for his arrest.