Crime Solvers Central
Crime Solvers Central
302 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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Summary based on the NamUs case record (MP18176) and 5 other sources
Joanne Gaye Illerich, 38, was last seen on May 7, 1999, leaving her family's home in Knights Landing, California. She departed between 9:30 a.m. and 1:00 p.m., and authorities believe she took a 9mm semi-automatic pistol with her. Illerich was driving a dark blue 1991 Mazda pickup truck with a white camper shell, but both she and the vehicle have not been located since that day.

Joanne was suffering from emotional difficulties at the time of her disappearance, including bouts of anger, delusion, and possible suicidal thoughts. She also suffered from physical pain in her neck and right arm, for which she sometimes wore a brace. Known to visit areas like Bucks Lake, Feather River Canyon, Point Reyes, and Sacramento, her regular haunts have provided no clues to her whereabouts.

Despite numerous efforts, her case remains unsolved, and law enforcement continues to seek information regarding her disappearance. If anyone has knowledge about the case, they are urged to contact the Sutter County Sheriff's Department.

Last Seen: May 7, 1999

Possible Unidentified Matches (1)

Unidentified remains cases whose details are consistent with this person, ranked by how closely they compare. Fields that are unknown in either case are left out of the score.

75%Possible
Jane Doe — San Francisco, California
UP5956 • Found Nov 9, 2003
View case
Sex ✓Female
Age 100%Est. 40–50 vs 38 when missing
Race 100%White
Location 81%80 mi away, same state
TimingFound 5 years after last seen
Height 100%5'9" vs 5'8"
Weight 0%190 lb vs 125 lb
Hair 50%Brown vs Red
Eyes 60%Brown vs Hazel

These comparisons are generated automatically from public NamUs case data and are not confirmed identifications. Only DNA, dental or fingerprint comparison by investigators can confirm an identity. If you believe two cases are connected, contact the agency handling the unidentified case.