If you watch some of the real life detective / crime shows. The people who murder people and get caught be cops, basically shoot people in broad daylight on camera, tell people about it, then immediately fold in interrogation.
We do have criminals who fold, either they're too confident, they trip up, etc. Recently some guy killed his sugar-momma in Fla, then took her car and drive it cross country to Seattle and along the way used her CC. He gave it all away in the jail interview.
Bla bla bla, prosecutors are the good guys and show all the evidence they have....
Um, not.
We keep finding again and again we're putting innocent people in jail even for things as serious as capital crimes, and later it was found the investigation was botched and there was no evidence that person was guilty and other evidence was never presented.