“I seem to remember doing time for a certain manslaughter charge.”
Personally, I don’t watch a lot of police procedurals. In my opinion, if there’s a crime on a TV show, they should either tell us who did it, or just admit that they don’t know and stop wasting everybody’s time.
So there’s a lot that I don’t know about how a police investigation should run. But even I know enough to say that pretty much everything that they do in today’s episode is wrong, and every character who appears on screen ought to be brought up on charges, up to and including the sheriff.