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William Marshall Sisco Jr. Missing Person Case

Last seen in Pima County, Arizona on Jun 12, 1994

Victim Details

Jan 24, 2026

Jan 24, 2026

William

Marshall Sisco Jr.

64

32

6'1 inches

165 lbs

White

Male

Jun 12, 1994

Pima County

Arizona

Pima County

Pima County Sheriff's Departmen

520-741-4900

09/19/2026

Case Description

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In the vast and often unforgiving landscape of Pima County, Arizona, the story of William Marshall Sisco Jr., a 32-year-old man, unfolds with a sense of unresolved mystery. On June 12, 1994, a day that began with the promise of fortune, William, known to his friends as Bill, was in the Happy Valley area with two companions, engrossed in the age-old pursuit of panning for gold. As evening descended, a disagreement erupted between William and his friends. He wanted to leave, but they did not share ...
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Last Seen: Jun 12, 1994

Links to Additional Sources (1)

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  • Unsolved - William Marshall Sisco Jr. #Missing Since: June ...

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    Forum Posts (2)

    Has anyone come across any new information or theories about the details of that argument William Ma... ...Read More
    11/04/2025
    Hey everyone, I’ve been diving deep into the William Marshall Sisco Jr. case, and a thought struck... ...Read More
    11/15/2024
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