We now have a update on the fatal crash in Mason County on Friday morning.

At 11:12 AM, emergency crews were called to a vehicle/pedestrian crash on US31 south of Freeman Road, in Mason County’s Free Soil Township.

45 year-old Melissa Sue Casterman of Grand Rapids was pronounced dead at the scene. The driver, 58 year old Mark Lazon Casterman was arrested at the scene for OWI Causing Death and Driving on a Revoked Ops Causing Death.

Detectives state they believe Melissa had been driving a 2013 Lincoln MKX southbound on US31 south of Freeman Road when an argument between her and her passenger/husband, Mark took place. Melissa pulled to the southbound shoulder of the road, exited the car, crossed the highway, and started walking southbound along the northbound shoulder.

Mark got behind the wheel and drove twice past the victim before doing a final “U” turn in front of Freeman Creek Equipment. Mark accelerated southbound on US31, crossed the centerline, traveled down the northbound shoulder, and struck the victim. The victim was killed instantly.

Mark Casterman has been charged and arraigned on Homicide – Open Murder, Operating While Intoxicated Causing Death, Operating – License Suspended, Revoked, Denied – Causing Death, and Operating While Intoxicated – 3rd Offence.

His bond has been set at $1,000,000.