The I-70 Killer (Midwestern U.S., 1992)

In the spring of 1992, six store clerks—often alone in small specialty shops—were shot to death in broad daylight along the Interstate 70 corridor in Indiana, Missouri, and Kansas. The unknown killer used a .22-caliber firearm, targeting women (and one man mistaken for a woman due to long hair) in shops close to the highway. Despite composite sketches and ballistic evidence, no suspect has ever been charged.