Walczak was last seen at Wild Horse Mesain Costilla County, Colorado sometime in mid-January 2005. There was several feet of snow on the ground when he disappeared. He has never been heard from again. Walczak left his wallet, money, eyeglasses, boots, jacket and truck in his rural cabin, and his dog was later found wandering nearby. He had left something cooking on the stove and it burned. His cabin smelled of propane and appeared to have been thoroughly cleaned.

Walczak worked as a building contractor at the time of his disappearance. He enjoys fishing and hunting and had lived an outdoor lifestyle for much of his life. He moved to Wild Horse Mesa from Denver, Colorado in 2005. Few details are available in his case.