206 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.
Case Description
Any updates on this case? Let us know!
Diana Mae Mattingly, age 64, was last seen on December 12, 2020, in Julian, California. She lived in the high desert near Anza-Borrego, specifically at the Butterfield Ranch RV Resort along county Highway S2. Mattingly reportedly suffered from dementia and Alzheimer’s disease, according to her neighbor and caregiver, Lisa Nellom. Nellom had been assisting Mattingly with daily tasks, including attending doctor’s appointments and managing her medications. In the days leading up to her disappea ...Read More
Last Seen: Dec 12, 2020
Links to Additional Sources (0)
See any mistakes? Let us know!
Victim Details

Jun 12, 2025

Jun 16, 2025

Diana

Mattingly

69

64

61 inches

105 lbs

White / Caucasian

Female

Dec 12, 2020

Julian

California

San Diego County

Julian

Yes

53

170746

San Diego County Sheriff's Department

San Diego

California

San Diego County

92123

9621 Ridgehaven Court, California

8585655200

County

Law Enforcement

www.sdsheriff.net

20152950

2020-12-15

San Diego County Sheriff's Department

10469

Blond/Strawberry

Blue

Blue

12/04/2025


Area Last Seen: