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Joanne Gaye Illerich
File Nº MP18176
10,034 Days Without Answers
- Age at Disappearance
- 38
- Last Seen
- May 7, 1999
- Location
- Knights Landing, Sutter, California
- Investigating Agency
- Sutter County Sheriff's Department
- Agency Case #
- 99-001341
- Agency Phone
- (530) 822-7313
- Height
- 68 in
- Weight
- 125 lbs
- Hair
- Red/Auburn
- Eyes
- Hazel
Circumstances
Illerich was last seen in Knights Landing, California on May 7, 1999, leaving her family home between 9:30 a.m. and 1:00 p.m. Authorities believe she took a 9mm semi-automatic pistol with her. She was driving a dark blue 1991 Mazda pickup truck with a white camper shell and California license plate 4HO9021, and the truck has never been located. She was wearing a polo shirt, gray or washed-blue Docker pants, black tennis shoes and a baseball cap, has a scar between her eyes and freckles, and may have been wearing a neck or right arm brace. Her case remains unsolved.
Sources: Charley Project (charleyproject.org/case/joanne-gaye-illerich) and NamUs (namus.nij.ojp.gov/case/MP18176).
Case file last verified October 20, 2026 against the official sources cited above.
More Case Information
Additional details from the official case record, provided for identification.
- Sex
- Female
- Race
- White / Caucasian
- Height
- The Charley Project lists 68 to 70 inches
- Weight
- The Charley Project lists 125 to 145 pounds
Sources: NamUs · Charley Project
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