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298 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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Summary based on the NamUs case record (MP7108) and 1 other source
In 1988, Mark Shaw Jennings relocated to the Seattle, Washington area, likely filled with hope and plans for the future. Just a few years later, however, the course of his life would become an enduring mystery. On September 11, 1991, at the age of 34, Mark had his last known contact with anyone. At the time of his disappearance, he was described as a Black male, standing at 5 feet 9 inches tall and weighing approximately 180 pounds. He had black hair that was beginning to show a bald spot, brown eyes, and a mustache. The specifics of what he was doing or his state of mind on the day he vanished remain unknown, leaving a void where answers should be.

The timeline following Mark's last contact is marked by a significant delay in official action. It wasn't until nearly two years later, on May 26, 1993, that he was formally reported as a missing person to the Seattle Police Department. The reasons behind this gap in time are not publicly detailed, adding another layer of complexity to an already perplexing situation. This delay could have unfortunately hampered the initial investigation, as memories fade and potential evidence can be lost over time. The circumstances surrounding why it took so long for him to be reported missing are a crucial, yet unanswered, part of his story.

Decades have now passed since Mark Shaw Jennings was last seen or heard from, and his case remains unresolved. The initial report filed with the Seattle Police Department under case number 93-231549 represents the official start of a search that has yielded no definitive answers. The lack of information regarding his clothing or any personal items he may have had with him at the time further complicates efforts to piece together his last known movements. The case is an overview of a life interrupted, a man who moved to a new city only to vanish, leaving behind only questions and the lingering hope of his family and community for closure.

Last Seen: Sep 11, 1991

Links to Additional Sources (1)

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Possible Unidentified Matches (2)

Unidentified remains cases whose details are consistent with this person, ranked by how closely they compare. Fields that are unknown in either case are left out of the score.

77%Possible
John Doe — Portland, Oregon - unidentified case UP9937
John Doe — Portland, Oregon
UP9937 • Found May 4, 1994
View case
Sex ✓Male
Age 100%Est. 30–40 vs 34 when missing
Race 100%Black
Location 66%146 mi away
TimingFound 3 years after last seen
Height 68%6'0" vs 5'9"
Weight 100%190 lb vs 180 lb
Hair 100%Black vs Black
Eyes 100%Brown vs Brown
75%Possible
John Doe — Portland, Oregon - unidentified case UP11900
John Doe — Portland, Oregon
UP11900 • Found Oct 6, 1991
View case
Sex ✓Male
Age 100%Est. 25–40 vs 34
Location 66%146 mi away
TimingFound 4 weeks after last seen
Height 100%5'8" vs 5'9"
Weight 100%165 lb vs 180 lb
Hair 100%Black vs Black
Eyes 100%Brown vs Brown

These comparisons are generated automatically from public NamUs case data and are not confirmed identifications. Only DNA, dental or fingerprint comparison by investigators can confirm an identity. If you believe two cases are connected, contact the agency handling the unidentified case.

Unidentified photos are blurred because many are post-mortem. Tap a photo to reveal it.