Crime Solvers Central
CSC
263 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.
Diana Mattingly missing person case profile photo

Diana Mattingly Missing Person Case

Last seen in Julian, California on Dec 12, 2020

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

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

07/04/2026


Area Last Seen:

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 ...
MEMBER ACCESS

Continue reading the complete case summary

Unlock the full case narrative for Diana Mattingly, all available source links, additional videos, and member discussions.

Unlock Full Case Access — $3.97/month
Cancel anytime.
Already a member? Log in

Last Seen: Dec 12, 2020

Links to Additional Sources (0)

See any mistakes? Let us know!

Latest News

View All

Forum Posts (2)

I've been mulling over the whole situation with Mattingly's open trailer door. It's strange that her... ...Read More
05/04/2025
Has anyone else noticed how strange it is that Mattingly's purse was found back in her trailer but s... ...Read More
04/08/2023
MEMBER ACCESS

Join the discussion for Diana Mattingly

Read full forum posts and contribute to this case discussion.

Unlock forum access — $3.97/month
Already a member? Log in

Other Missing Cases from Julian, California

Kimberly Cozart missing person case in Julian, California

Kimberly Cozart

Missing: Feb 01, 1977
Kimberly Cozart, also known as Kimberly Harper, was a 14-year-old girl who went missing from Julian, ...Read More
Edith Baker missing person case in Julian, California

Edith Baker

Missing: Aug 26, 2001
Edith Verline Baker, a 79-year-old woman, was last seen on August 26, 2001, at the KQ Ranch Resort n ...Read More