Dealing with psychopath nutjobs

[Jackalope]

Here, the police enforce the law, and the courts handle those areas where it has been breached. The cops don't hand out sentences, and the courts don't stand you off at gunpoint, essentially.

Police, for example, don't care if you are guilty or innocent, only if you are present.

The courts don't care if you were present, only if you are guilty or innocent.

Fair enough. There are quite a few things off the top of my head that I find intriguing. I'm still trying to work out though what happens when something is legal according to State law, but illegal according to Federal law? If I'm not mistaken, like Colorado? They legalised pot but I don't think it's legal Nationwide, so what is the point of federal law if States can tell it to f off?

Federal law is concerned (ostensibly) in matters of interstate law, not intrastate law. The vast majority of criminal cases are tried by state courts, under state laws.

Washington state (where I live) also legalized pot - the law was crafted in such a way to avoid interstate issues as much as possible. That won't necessarily stop the federal government from stepping in, but they have so far shown no interest in doing so - and it's questionable whether they have the authority to do so.