After leaving his home, Rey Rivera disappears, then, days later, his car is found and a strange sight at a historic hotel triggers a mystery.
Within a 13-minute window of time, Patrice Endres vanishes from the salon she owns; then, 600 days later, her case takes a shocking turn.
After a man and his family disappear, authorities unearth something horrifying.
Alonzo Brooks vanishes after a party, and his body is found a month later; many believe his death is a hate crime.
In Berkshires County, Mass., residents recall their experiences with a UFO on the night of Sept. 1, 1969.
Lena Chapin claims her mother killed her stepfather; years later, she receives a subpoena to testify in court, but she disappears.