Jennifer Lee Klein was 3 years old when she disappeared on May 25, 1974, while camping with her family about ten miles north of Moab, Utah. The family was on Memorial Day weekend; Jennifer had been playing in the sand near the Colorado River with her mother and older brother. Her father briefly went back to the camper, and during that time a dogfight broke out and distracted the mother and brother. When they looked back, Jennifer was gone.

Searches were extensive but yielded no recovery. Investigators have long considered accidental drowning as a possibility, though her body was never found. Some witnesses reported an old car parked between the campsite and the river at the time, prompting concern about possible abduction, but no concrete evidence has confirmed that theory. Jennifer was last seen in a swimsuit and had a cowlick on the right side of her forehead and a possible birthmark on her abdomen.

The case remains open. Anyone with information about that day or who remembers seeing an unfamiliar vehicle near the river is asked to come forward.