There was a case in 1986 in Connecticut in which an airline pilot murdered his wife, froze her body, cut it up in pieces using a chain saw, then fed the pieces through a rented wood chipper on a bridge over a lake in the middle of the night during a snow storm. Unfortunately for the murderer, a snow plow operator remembered where he'd seen a chipper in the night. The murderer got 99 years after the prosecution matched teeth found in the chipper output to his wife's dental records.
The Woodchipper Murder Case
Dr. Henry Lee, of OJ and JonBenét fame, led the forensics team.