Not sure if you guys remember the famous case back in the 80's where a man rented a wood chipper and killed his wife and ran it through. Claimed she left him. He hosed it down and everything. On a hunch, four years later...the detective flat out accused him of killing her and the fool confessed everything right then on the first go. They later had to get evidence and after much search of the area that the fool eagerly gave them the location of, they found 1/8 an ounce of a tooth and convicted him with that evidence and his confession.