Shawn Eric Spencer was 26 when he was last seen in Camdenton, Missouri, on or around April 4, 2006. At the time he lived a transient lifestyle, moving between short-term jobs in food service and labor, and he had no reliable transportation, often traveling on foot or by hitchhiking.

He was last known to be with his dog, a Rottweiler/Bullmastiff mix, which also disappeared. Family members did not report him missing right away because he had a history of disappearing for long stretches; a formal missing person report was filed by his mother in April 2007. Investigators later linked his disappearance to a shooting reported at a residence on Silver Mountain Drive in early April 2006, and statements placed Spencer at that property shortly before he vanished. Authorities treated the case as a suspected homicide, though his remains have not been publicly recovered.

If anyone was in Camdenton in early April 2006 and remembers seeing Shawn, his dog, or activity near Silver Mountain Drive, please come forward with information.