Shannon Elaine Arif, 20, disappeared from Clarksville, Tennessee, on March 17, 1998. Her husband, a soldier stationed at Fort Campbell, saw her at home around 9:45 a.m. before leaving for work. Shannon was scheduled to work an evening shift at Walmart from 4:30 p.m. to 9:15 p.m., but she never reported for duty. Her car was found locked in the Walmart parking lot with her purse inside and no sign of her; store management confirmed she had not shown up for the shift.

Investigators treated the case with suspicion while also noting a coworker had mentioned marital problems, so investigators considered the possibility she left voluntarily. Searches of the area, including with cadaver dogs, turned up nothing, her bank accounts were untouched, and no contact was ever made. Her son was 15 months old at the time. The case remains open and unresolved.