Vital Statistics at Time of Disappearance
Details of Disappearance
Mark was last seen on September 4, 1982 in San Luis Obispo, CA.
Investigators said he had made comments about wanting to live off the land in the mountains and bought camping gear prior to his disappearance.
A few days after Addison was reported missing, the vehicle he was associated with was found in the Bakersfield area.
If you have any information concerning this case, please contact:
San Luis Obispo Police Department