I know I sound like a broken record on this and many other issues, but unless you want someone beaten, killed or thrown into a cage–and you don’t get to choose which–do not call the police.
For example, if you wake up in the night and you house is being robbed by an axe wielding man, calling the police might be appropriate. If the assailant doesn’t leave in the next hour, there is a non-zero chance that the police will arrive to kill or capture him–assuming they don’t show up at the wrong house and kill your neighbor or mistake you or your loved ones for the home invader and kill you. If all goes well in the case of the axe wielding home invader, it’s not impossible that calling the police is the best option–assuming you’re unarmed.
As a counter-example, if a nice, young special needs gentleman won’t leave a movie theater when asked, you should probably call his parents, find some other non-homicidal adult to persuade him or, if all else fails, let him watch the damn movie again. The absolute wrong move in this case is to call in the brute squad to try out their pain holds and torture techniques on him. They’re most likely not going to care if they “accidentally” kill him, but assuming you’re not completely evil, it might bother you for the rest of your life.
This young man was killed by police.
It is a testament to the power of state schooling and corporate media that anyone, anywhere, ever considers calling the police to resolve a situation that is not already life-threatening. The police are simply thugs with one prerogative, to compel obedience. If they can’t achieve submission of their victim, they will kill the victim. This is completely unrelated to context and they have no need to account for their actions after the fact.
In this case, there are even reports that the police were off-duty and serving as private security. Their status as cops seems to have kept them from prosecution thus far.