In what way would precogs have absolutely been required here? This was out in the open in a public place. Ever considered that if there were ample police people wouldn’t be so brazen as to commit murder in public, better yet, police could have potentially prevented it from happening or assisted after the fact. The fact that many SF can’t even imagine another way this could have been prevented is exactly why they can’t fix it… and exactly why people are fleeing. Don’t delude yourself.