so what we have is "some guys were obviously up to something" , as the crime being investigated. I would like to know exactly what it was. When a group of police charge into a group of gang members who are on probation, there is a high likelihood that the gang members will react in a negative way. They may have been mugging old ladies, or they may have been just sitting around talking. Testosterone takes over on both sides, and a firefight breaks out. Again, did this need to happen? We will only know when the original reason that the police decided to engage the group is releases.
I am not saying that these guys are innocent, or didnt need to be arrested for whatever they were doing, but the end result is a completely unrelated innocent person has died do to the processes being followed by the police. Maybe they were saving someone else, maybe they just instigated a crime by looking hard enough.