Missing Since: August 10, 1992 from Bremerton, Washington

Classification: Endangered Missing

Date of Birth: July 7, 1936

Age: 56 years old

Height and Weight: 6'0 - 6'1, 145 - 160 pounds

Distinguishing Characteristics: Caucasian male. Gray hair, hazel eyes. Koller had a beard and goatee at the time of his disappearance, and his hair was shoulder-length. He has the following tattoos: a fish above each breast with the words "sweet" and "sour," a sailing ship on his upper right arm, a butterfly which is possibly on his right shoulderblade, a rose with the words "Mom" and "Dad" on his right forearm, an unspecified tattoo on his left forearm, and a star on the bottom of his right thumb. He wears an upper denture plate. Koller's fingertips on his left hand are calloused from playing the guitar and the mandolin.

Clothing/Jewelry Description: A cowboy hat and cowboy boots.

Medical Conditions: Koller was in poor health at the time of his disappearance. He is an alcoholic.