No, that’s not how things work in the United States. Law enforcement officers don’t have a general license to kill. Genuine interference with law enforcement is a crime, but if an officer kills someone for doing it, that’s still murder.
This is a description of your stance on Alex Pretti.
I do think it's important to be fair-minded. Minnesota is conducting investigations, and perhaps they will conclude that it wasn't murder after all; if they do then I would defer to that judgment as well.