FILE Nº MP72306
Active
Davante Marquez Richardson
2,283 Days Without Answers
Case File
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ACTIVE
Karen Lee Valdez-Blackburn
File Nº MP38394
15,680 Days Without Answers
- Age at Disappearance
- 26
- Last Seen
- November 21, 1983
- Location
- Cheyenne, Laramie, Wyoming
- Investigating Agency
- Air Force Office of Special Investigations
- Agency Case #
- 33298151621616
- Agency Phone
- (877) 246-1453
- Height
- 61 in
- Weight
- 115 lbs
- Hair
- Brown
- Eyes
- Blue
Circumstances
Valdez-Blackburn was last seen in Cheyenne, Wyoming on November 21, 1983. She was a vehicle mechanic assigned to the 90th Transportation Squadron at F.E. Warren Air Force Base and was seen loading her yellow Dodge Ram pickup truck, which had Colorado license plate 4250JX. She is believed to have been on her way to Denver, Colorado to visit a friend. She never arrived and was classified as a deserter a month later, but she is now listed as a missing person and the circumstances of her disappearance remain unclear. Her case remains unsolved.
Sources: Charley Project (charleyproject.org/case/karen-lee-valdez-blackburn) and NamUs (namus.nij.ojp.gov/case/MP38394).
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 62 inches
- Weight
- The Charley Project lists 118 pounds
Sources: NamUs · Charley Project
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