In Myrtle Beach, S.C., 17-year-old spring breaker Brittanee Drexel vanishes just moments after sending a text message to her boyfriend; police track her cell phone to a swampy area known for alligators.

After spending the day with her students, a high school teacher vanishes and a glove with male DNA is found in her yard.

Police receive a tip 6 years after a 28-year-old woman disappears, connecting an old colleague to it and another women's murder.

When his wife, Tanya, fails to return home, Tom Rider begs police to look for her, but they ignore his pleas at first, then they zero in on him as a chief suspect in her disappearance.

Marina resort owners are no where to be found after meeting with their accountant when they discover money missing.

When 22-year-old Bradyn Fuksa vanishes from his new apartment, his car is found 700 miles away, and it is soon revealed he has been guarding a dark secret.