Case Description
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Mark Addison, 22, went missing on September 4, 1982, from San Luis Obispo, California. Prior to his disappearance, Mark had purchased camping gear and mentioned to others that he planned to head into the mountains to live off the land. His vehicle was found abandoned in Bakersfield, California, a few days later, but no further clues about his whereabouts have emerged since then.

Mark was last seen wearing Levi's jeans, a blue/gray plaid shirt, and a green and white baseball jersey. He h ...Read More
Last Seen: Sep 04, 1982
Links to Additional Sources (5)
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Victim Details

Apr 22, 2013

Sep 05, 2018

Mark

Addison

63

22

69 inches

160 lbs

170 lbs

White / Caucasian

Male

Sep 04, 1982

San Luis Obispo

California

San Luis Obispo County

13445

San Luis Obispo Police Department

San Luis Obispo

California

,

00-0713042

San Luis Obispo Police Department

Brown

Brown

Brown

09/27/2024


Area Last Seen:
Forum Posts (3)
Has anyone heard of a GoFundMe page set up for Mark's family? I heard they are going through a tough... ...Read More
08/10/2024
It is concerning how little attention the case of Mark has received in the media. This is an importa... ...Read More
03/25/2024
Does anyone know if Mark Addison's case is listed in the Namus database? I am trying to gather more ... ...Read More
12/07/2023