Carl Herman Mau, 46, was last seen May 24, 2000, while hiking in the Four Peaks Wilderness of the Tonto National Forest. An experienced hiker, he became separated from his hiking partner during the outing and never reunited with them or returned. The partner reported him missing and the Maricopa County Sheriff’s Office coordinated search and rescue efforts, but searches turned up no sign of Carl.

He was wearing an off-white t-shirt, tan slacks and brown hiking boots, and carried a grey backpack. He wore prescription eyeglasses with black or tortoise shell frames. Described as a white male, 6 feet 0 inches, 160 pounds, with black hair, a mustache, blue eyes and a knife scar on his right chest, Carl’s circumstances at the moment of separation have not been publicly detailed and no substantive leads have emerged.

Does anyone who hiked Four Peaks around May 24, 2000, or who knew Carl, have information that could help explain what happened that day?