Tomorrow night Marilyn Manson and Rob Zombie bring their "Twins of Evil" tour to the downtown venue.
It's expected to be draw large crowds, which some fear, could turn ugly if drugs and alcohol are involved.
Police say certain music like heavy metal not only brings fans...it also encourages illegal activity.
A Bassnectar concert at the coliseum last week kept police busy for hours trying to control people who had overdosed on drugs.
Bloomington Police Chief Randy McKinley encourages patrons to have a good time, but not if it puts public safety at risk.
"If you're going to enjoy Rob Zombie and Marilyn Manson, then go enjoy Rob Zombie and Marilyn Manson and knock off the criminal behavior," said McKinley. "It's dangerous."
US Cellular Coliseum will also have staff on hand.
It says people's safety is a top concern, which it takes into account when putting security plans together.