206 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.
Case Description
Any updates on this case?
Mark O'Neill, a 45-year-old man from Harbor Beach, Michigan, went missing on October 16, 1988. His disappearance has remained a mystery, with very few details available regarding the circumstances leading up to it. Mark was last seen in the Harbor Beach area, and his case has been classified as a missing person investigation. There has been little to no physical evidence to explain what may have happened to him, and despite efforts from law enforcement, no major leads have emerged in the years s ...Read More
Last Seen: Oct 16, 1988
Last Seen: Oct 16, 1988
Links to Additional Sources (1)
See any mistakes?Victim Details
Mar 25, 2011
Jul 09, 2019
Mark
ONeill
81
45
68 inches
180 lbs
White / Caucasian
Male
Oct 16, 1988
Harbor Beach
Michigan
Huron County
48441
181
9831
Huron County Sheriff's Office
Bad Axe
Michigan
Huron County
48413
Daryl Ford
Detective
250 East Huron Avenue, Michigan
9892696500
County
Law Enforcement
4415-88
1988-10-17
Huron County Sheriff's Office
Brown
Brown
Brown
11/21/2025
Area Last Seen:
Forum Posts (3)
Does anyone have any info on possible sightings of Mark O’Neill around October 1988? It’s strang... ...Read More
02/14/2024
02/14/2024
Does anyone else find it strange that there's hardly any mention of Mark O'Neill's personal effects ... ...Read More
11/22/2023
11/22/2023
Has anyone else done a deep dive into the weather conditions on the night Mark O'Neill went missing?... ...Read More
07/01/2023
07/01/2023
