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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

07/07/2026

Case Description

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William Marshall Sisco Jr., a 32-year-old man, went missing from Pima County, Arizona on June 12, 1994. At the time of his disappearance, he was in the Happy Valley area with two friends, panning for gold. An argument reportedly broke out between Sisco and his friends that evening because Sisco wanted to leave, and his friends did not. Consequently, Sisco departed the area alone and on foot, and has not been seen or heard from since.

At the time he went missing, Sisco was described as a ...
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Last Seen: Jun 12, 1994

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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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