Port Huron Township, MI – Authorities in St. Clair County are searching for a 53-year-old man who went missing earlier this week, prompting a countywide alert and renewed efforts to locate him.
According to the St. Clair County Sheriff’s Office, Mark Stevenson left his home in Port Huron Township on Saturday, November 1, 2025. Deputies said he departed in his vehicle, which has since been recovered in St. Clair County. The vehicle was found unoccupied, and Stevenson has not made contact with family or returned home.
Deputies noted that Stevenson is diabetic, suffers from depression, and is currently without his medications, raising increased concern for his safety. The sheriff’s office released a photograph of Stevenson, appealing to the public for assistance in locating him.
Investigators have not released details on where the vehicle was located or whether any indications of direction of travel were discovered at the scene. The department said all available resources are being utilized as the search continues throughout the Port Huron Township area, St. Clair County, and nearby communities.
Authorities are urging residents to remain alert, especially in rural areas, wooded trails, and around commercial properties where an individual in distress may seek shelter. Deputies emphasized that even small pieces of information—such as potential sightings, surveillance footage, or abandoned property—could help move the investigation forward.
Anyone who sees Stevenson or has information on his whereabouts is urged to contact St. Clair County Central Dispatch immediately at (810) 958-8115. Officials request that residents do not approach a potential sighting directly but instead call law enforcement so deputies can respond.
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