Avoid hiring jihadis, period.
My son recently became a police officer after waiting almost a year to pass the required background/psychological/physical tests. And after passing all those tests, he had to pass a lie detector test that was pretty thorough in determining his outlook on police work and society. All this comes after the events in Ferguson, and is located near where the riots took place. If he had been with the police at the time, he would have been standing there on the front line with riot gear while the punks threw spit and piss at him.
The police in the St Louis area are keenly aware of the problems police face, and are very serious when it comes to getting recruits that will know how to handle a badge and a gun in the most tense situations.
On the other hand, it looks as though the Minneapolis Police hired Noor based on his looks and culture rather than his ability to be an effective police officer.
I expect the Damond family to sue the city of Minneapolis, and in this case, I hope the city and its liberal taxpayers have to pay a ton of money for their recklessness in hiring a person unfit for the job.
My guess is that they knew he was unfit from the beginning, but was accepted just because of his nationality.