Robert Eugene Linneman was 42 when he was last seen in Lawrence, Kansas, on March 21, 1998. His family reported him missing and the Lawrence Police Department filed a report on April 6, 1998. At the time he was described as a white male, 5 feet 10 inches to 6 feet tall, 150 to 160 pounds, with brown hair and brown eyes.

Associated with the case is a tan and brown 1984 Ford F150 pickup truck, 4x4 regular cab, Kansas plate MJL118. It is not publicly clear whether the vehicle was recovered or disappeared with him. Very little is known about his activities or state of mind on the day he vanished, and the case was entered into national missing person databases under NamUs MP70490.

If anyone in the Lawrence area from 1998 remembers Robert, the pickup, or has any information that might help resolve this long cold case, please come forward.