Daniel Gerard Chervenka Jr, 28, disappeared after a family dinner in Fountain Hills and a troubling phone call to his sister on May 28, 1999. A Navy veteran, father, and student of astrophysics and philosophy, he was also an artist and classical guitarist. Diagnosed with bipolar disorder in 1997, he reportedly stopped medication in 1998.

The day after his last contact, a wallet belonging to Daniel was found on a road leading into the Four Peaks Wilderness, about an hour north of Phoenix; the finder left a message on his answering machine. Eleven days after he was last heard from, police searched his Phoenix apartment and found a Bible and an open notebook but no sign of him. On June 9 his vehicle was located abandoned at the Cline Trailhead and searches of the rugged Four Peaks area produced no further clues. Daniel was not known to hike in Four Peaks as an adult, and why he traveled there remains unexplained.

Anyone who knew Daniel, his routines, or saw him in late May 1999 in Phoenix or near Four Peaks is asked to share what they remember.