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Crime Solvers Central
302 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 (MP21250) and 2 other sources
On May 24, 2000, 46-year-old Carl Herman Mau was enjoying a day of hiking in the vast and rugged terrain of the Tonto National Forest in Arizona. An experienced hiker, Carl was familiar with the challenges and beauty of the Four Peaks Wilderness area. He was with a hiking partner that day, exploring the scenic trails. At some point during their hike, Carl and his partner became separated. What began as a recreational outing soon turned into a distressing mystery as Carl failed to reunite with his companion or return from the wilderness. He was wearing an off-white t-shirt, tan slacks, and brown hiking boots. He also had a grey backpack and wore prescription eyeglasses with black or tortoise shell colored plastic frames.

The hours after Carl was last seen were filled with growing concern. When he did not appear, his hiking partner alerted the authorities, and a search was initiated. The Maricopa County Sheriff's Office was tasked with the significant challenge of locating a missing person within the expansive and often unforgiving landscape of the Tonto National Forest. Search and rescue teams were deployed, scouring the area where Carl was believed to have been. Despite their efforts, the search for Carl yielded no signs of his whereabouts. The days turned into weeks, and the initial hope of finding him safe began to fade, leaving his family and friends in a state of painful uncertainty.

The disappearance of Carl Mau remains an unresolved case, a quiet but persistent question mark in the files of the Maricopa County Sheriff's Office. Over the years, his case has been reviewed, but the wilderness has held its secrets close. Carl is described as a white male, 6'0' tall, weighing 160 pounds, with black hair, a mustache, and blue eyes. He has a distinctive knife scar on his right chest. The circumstances of his separation from his hiking partner have not been publicly detailed, leaving a void of information about the final moments before he vanished. Without any leads or new evidence, the case has grown cold, a testament to the profound and sometimes permanent way a person can disappear into the natural world. The official record of his disappearance serves as the only public account of a day that started with the promise of adventure and ended in lasting mystery.

Last Seen: May 24, 2000

Links to Additional Sources (2)

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Possible Unidentified Matches (6)

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.

79%Possible
John Doe — Rio Verde, Arizona - unidentified case UP13861
John Doe — Rio Verde, Arizona
UP13861 • Found Apr 28, 2015
View case
Sex ✓Male
Age 100%Est. 50–65 vs 46 when missing
Race 100%White
Location 98%17 mi away, same county
TimingFound 15 years after last seen
Height 100%5'11" vs 6'0"
Hair 60%Brown vs Black
78%Possible
John Doe — Tempe, Arizona - unidentified case UP2042
John Doe — Tempe, Arizona
UP2042 • Found Mar 11, 2003
View case
Sex ✓Male
Age 92%Est. 50–60 vs 46 when missing
Race 100%White
Location 91%43 mi away, same county
TimingFound 3 years after last seen
Height 68%5'9" vs 6'0"
Weight 73%122 lb vs 160 lb
Hair 40%Gray vs Black
Eyes 100%Blue vs Blue
77%Possible
John Doe — Phoenix, Arizona - unidentified case UP819
John Doe — Phoenix, Arizona
UP819 • Found Aug 2, 2007
View case
Sex ✓Male
Age 100%Est. 35–50 vs 46 when missing
Race 100%White
Location 90%46 mi away, same county
TimingFound 7 years after last seen
Height 68%5'9" vs 6'0"
Weight 100%155 lb vs 160 lb
Hair 100%Black vs Black
Eyes 0%Brown vs Blue
77%Possible
John Doe — Peoria, Arizona - unidentified case UP142022
John Doe — Peoria, Arizona
UP142022 • Found Feb 12, 2025
View case
Sex ✓Male
Age 100%Est. 57–70 vs 46 when missing
Race 100%White
Location 89%50 mi away, same county
TimingFound 25 years after last seen
Height 84%5'10" vs 6'0"
Weight 100%120–150 lb vs 160 lb
Hair 70%Gray vs Black
75%Possible
John Doe — Phoenix, Arizona - unidentified case UP2034
John Doe — Phoenix, Arizona
UP2034 • Found Jul 27, 2003
View case
Sex ✓Male
Age 91%Est. 35–45 vs 46 when missing
Race 60%Hispanic
Location 90%46 mi away, same county
TimingFound 3 years after last seen
Height 100%6'0" vs 6'0"
Hair 100%Black vs Black
75%Possible
John Doe — Williams, Arizona - unidentified case UP9961
John Doe — Williams, Arizona
UP9961 • Found Feb 16, 2001
View case
Sex ✓Male
Age 85%Est. 30–50 vs 46
Race 100%White
Location 74%107 mi away, same state
TimingFound 9 months after last seen
Height 100%6'0" vs 6'0"

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.

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