State police or FBI might look into whether police broke the laws. As for the civil suit, virtually every agency and every officer involved, and then a few extra for good measure, can expect to be named in a civil rights suit by Mr. Dorner's estate. Whether that suit stands any chance of winning is an entirely and, at this juncture, unanswerable, question.
A gunfight is not the time to learn new skills.
If you ever have a real need for more than a couple of magazines, your problem is not a shortage of magazines. It's a shortage of people on your side of the argument. -- Art Eatman