Are we all too prone to point the finger?

I just saw breaking news; a man shot and killed someone in New York, he fired on police, they returned fire and killed him. During the exchange, some others were injured. The news woman speaking to the guest went over the details. Her first question was something to the effect of “Were the collateral injuries avoidable, or were the police somehow at fault for over reacting?”
Really?
The guest corrected her and was nice about it. He explained how circumstances, crowding, etc. made it difficult for police.
It got me to thinking that this seems to be a common phenomonon in our country. After the bad guy is apprehended and everyone is nominally safe again, someone starts questioning and wanting to assign blame to the ones putting themselves in harm’s way on a daily basis to keep the rest of us safe.
Am I imagining things? Is it proper for people to immediately question the police?
Maybe it’s just me.