Dorothy May Thompson, known as Dot, was 53 when she disappeared in late summer 1969. On August 25 she was in Walla Walla, Washington, and penal authorities there gave her a bus ticket and instructions to return to Vancouver, Washington and report to an officer. That ticket is the last concrete trace in the case; there is no confirmation she ever boarded a bus or that anyone saw her in Vancouver.

Her disappearance is otherwise sparsely documented. The Clark County Sheriff’s Office in Vancouver handles the investigation. Dorothy was described as a woman in her early fifties with brown hair and brown eyes; a son later provided a DNA sample for comparison. The reason she was in Walla Walla and the nature of the report she was to make are not known.

Anyone who saw Dorothy in Walla Walla or Vancouver in August 1969, or who has information about her movements after August 25, is asked to contact the Clark County Sheriff’s Office.