Prosecutors say husband murdered wife and staged the scene to look like a freak car accident

Todd Kendhammer says his wife Barbara died in a freak car accident. But authorities questioned his story from the beginning, and he was tried and convicted of intentional homicide.

Kendhammer and his children have refused to accept the verdict and are seeking a new trial. Their fight for what they say is justice is the focus of "Mystery on County Road M," an all-new "48 Hours" reported by correspondent Erin Moriarty airing Saturday, January 29 at 10/9c on CBS and streaming on Paramount+.

Just after 8 a.m. on September 16, 2016, a distraught Todd Kendhammer called 911 to report a car accident on a rural road outside La Crosse, Wisconsin. "A pipe or something came through the windshield," he told the operator.