You have to observe the rules of evidence and discovery, or it can go wrong. There was a guy who was arrested and convicted for a murder in Wisconsin. The cops put him away for a crime he didn’t commit, and he was eventually freed because of DNA evidence. They had a weak case, originally, so it was easy to reverse the decision. The newly released man and a nephew who had no previous serious criminal past, then murdered a female reporter checking out his story.The cops weren’t wrong to put him away, but they really needed to wait until they had a good case that couldn’t be torn down later. Sometimes they see a chance and take it, even if they know it isn’t right, for the good of the community.But it really isn’t, in the long run. It’s not enough to be right. You also have to be certain of the specific facts of a case so it’s all by the book and final.