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Kirchner was last seen in Coconino County, Arizona in early April 2007. He worked as a physicist back in Germany and had visited the United States many times before. He was hiking a remote section of the Navajo Reservation. He's an experienced hiker who was in good physical condition and hiked extensively in the Colorado Plateau area. Kirchner failed to meet his girlfriend in Las Vegas, Nevada on April 9. The search for him began on April 12. That day his rented truck was found near the rim of the Little Colorado River Gorge, west of Tuba City, about two miles from Hell Hole Bend.
Coconino County Sheriff’s Office