Sometimes committing a crime will result in an arrest. If the heat is high and it has cause the police to descend on a corner, they may arrest any of your crew members that end their turn on that corner. If that happens, the officer will confiscate all of the cash and cargo that might be in that vehicle. If you’re currently in a precinct where the cop has been paid off by your outfit, then they’ll just pretend that they did see anything and no arrest will result regardless of the heat value. However, outside of your territory, they will still prevent nearby businesses from conducting any deals until the police move on.