On a sweltering August day in 1992, Tammy Jo Zywicki dropped her younger brother off at Northwestern University in Illinois, and set out for Grinnell College in Iowa, excited for her senior year.
The 21-year-old never made it.
Hours after Tammy left the Chicago area and headed west toward Iowa on I-80, her white 1985 Pontiac 1000 hatchback was found abandoned on the side of the road, five miles east of LaSalle, Illinois.
Tammy — an upbeat, athletic, talented amateur photographer from Marlton, New Jersey — was nowhere to be found.
For nine days, her family, friends and the police looked for her.
Their...