George Carpenter was reported missing to the San Luis Obispo Police Department on December 23, 2009 after he left to take his dog to Laguna Lake Park but never returned home.
His wife said he suffered from mild dementia.
About a month after his disappearance, Carpenter's Jeep Comanche was found near Fort Hunter Liggett and his dog, Scooter, was found near the community of Gorda in Monterey County.
Search and rescue teams from both San Luis Obispo and Monterey counties searched the area but were unable to find any trace of Carpenter.
He would be 80 years old in 2015.
NamUs Missing Persons Database