William Sinclair Missing Person Case

William D. Sinclair, a 29-year-old man from Hopkins, Minnesota, disappeared on April 28, 1978, under suspicious circumstances. He was last seen attending a party on 11th Avenue South, near the Hopkins Police Department. After the party, Sinclair vanished, and his car was found abandoned nearby. The keys were still in the ignition, and his eyeglasses were discovered on the floor of the vehicle, but there were no signs of him at the scene.

Sinclair was last seen wearing a blue jacket, a dark blue sweater, a light brown shirt, and blue jeans. He also had a three- to four-inch surgical scar on his abdomen, which could aid in identification. Despite extensive searches, there have been few leads over the years, and his case remains unsolved. Authorities continue to list his disappearance as endangered, with no clear evidence indicating whether foul play was involved.

Sinclair's family and law enforcement have been seeking answers for decades, but his fate remains a mystery.
Last Seen: Apr 28, 1978

Missing Person / NamUs

Hopkins boy

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