One of the things that scares me about the US criminal justice system is that it relies almost entirely on magical thinking and torture to secure convictions. I don't believe anyone is guilty unless they were literally photographed holding the bloody knife while standing over the body and even then I'll need some convincing to rule out potential mitigating circumstances.
You mean the police procedural, right?
Because classic mystery stories focus way more on what actually solves murders - detective grunt work like alibis, motives, timelines, etc