The band's legion of fans in St Louis' were left devastated after Saturday night's concert there was called off at the last minute.
In other words, the police say they have their hands full with demonstrations through other parts of the city.
"In light of this information", the statement continued, "we can not in good conscience risk our fans' safety by proceeding with tonight's concert".
More updates to come, if necessary.
Stockley originally said he wanted to kill Smith - whom police had pursued on suspicion of him taking part in a drug deal - in the wake of a auto chase that lasted for around three miles before he and his fellow officers caught up to Smith.
Former police officer Stockley was found not guilty of first-degree murder and armed critical action on Friday, nearly six years after the incident happened when he shot Smith five times after a high-speed auto chase that ended with a collision. The protesters threw paint at the house and broke at least two windows.
Protesters shouted slogans such as "black lives matter" and "it is our duty to fight for our freedom" as they marched.
Stockley and his partner chased Smith, who was shot five times in his vehicle.
Prosecutors said that during the pursuit, Mr Stockley could be heard saying on an internal police vehicle video he was going to kill Mr Smith. Prosecutors had argued that the former police officer, Jason Stockley, planted a gun after the shooting, something he denied.
St. Louis Mayor Lyda Krewson wrote, "I am sobered by this outcome".