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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 (MP35447) and 3 other sources
In early April 2007, Reinhard Kirchner, a 61-year-old physicist from Germany, vanished while hiking in a remote part of the Navajo Reservation in Coconino County, Arizona. An experienced and physically fit hiker, Kirchner had a deep appreciation for the Colorado Plateau, a region he had explored extensively on numerous trips to the United States. On what was to be his last known excursion, he was equipped with a day pack, a walking stick, and a camera in a black case. He was reportedly wearing earth-toned hiking pants and a green or tan shirt. The alarm was raised when he failed to meet his girlfriend in Las Vegas for a planned meeting on April 9, 2007.

The official search for Reinhard Kirchner began on April 12, 2007. That same day, his rental truck was discovered near the rim of the Little Colorado River Gorge, west of Tuba City and approximately two miles from a landmark known as Hell Hole Bend. For six days, search teams scoured a vast and rugged area of 56 square miles, but found no trace of the missing hiker. The terrain presented significant challenges, including numerous sinkholes that were considered too dangerous for searchers to enter directly, though they were inspected with cameras. Despite the extensive efforts, no clues to Kirchner's whereabouts were uncovered, and the active search was eventually called off.

The disappearance of Reinhard Kirchner remains an unresolved case, with the prevailing theory being that he became lost or injured in the unforgiving wilderness. A German news outlet reported on his disappearance, noting that the search was hampered by the lack of a clear direction of travel. As an avid hiker with considerable experience in the area, his vanishing is particularly perplexing. No physical evidence related to his disappearance has ever been found. The Coconino County Sheriff's Office has asked for anyone with information regarding Kirchner's case to come forward. His case serves as a somber reminder of the inherent risks of exploring even for the most seasoned individuals in the vast and wild landscapes of the American Southwest.

Last Seen: Apr 4, 2007

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.

76%Possible
John Doe — Las Vegas, Nevada
UP6749 • Found Dec 28, 2008
View case
Sex ✓Male
Age 100%Est. 60–70 vs 61 when missing
Race 100%White
Location 54%207 mi away
TimingFound 21 months after last seen
Height 100%5'9" vs 5'10"
Hair 100%Gray vs Gray
Eyes 100%Brown vs Brown
75%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 61 when missing
Race 100%White
Location 67%138 mi away, same state
TimingFound 18 years after last seen
Height 100%5'10" vs 5'10"
Weight 100%120–150 lb vs 160 lb
Hair 100%Gray vs Gray

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.