Teresa Armanda Alfonso was 12 when she vanished from Marathon, Florida, after being dropped off at the Marathon Movie Theater on September 3, 1974. She went to the theater with 16-year-old Cynthia Robin Gooding; the two reportedly planned to hitchhike to a party afterward but neither returned home that night. Teresa was described as shy and timid, with brown hair, brown eyes and a small gap between her front teeth. She was last seen wearing a blue shirt and brown pants.

Both girls disappeared without a trace and, despite extensive searches and ongoing investigation, no significant breakthroughs have been reported. The family and investigators continue to seek answers about what happened that night in 1974. If anyone knew Teresa, Cynthia, their plans that evening, or saw them in Marathon that night, please share information that might help the case.