The family of Kenia Monge share the agonizing details of what happened around the beautiful, 19-year-old's disappearance.

Hannah's best friend knew something was wrong when she stopped responding to her texts. No one knew that Hannah had been abducted by someone close to her.

April's mother recalls the day she asked her 14-year-old daughter to text her when she got home from walking the dog. April never did. Instead, she sent a cryptic text to her boyfriend and disappeared. What happened?

Successful real estate agent, Beverly Carter, went missing after showing a home to potential buyers. Later that evening, 50-year-old Beverly began texting her husband. Family and friends recall why the texts seemed suspicious.

When Deserae Turner didn't come home after school, her mother and friends began texting her incessantly. A massive search ensued, and 47 of her friends were questioned. Turns out her Snapchat may have been the key to the mystery.

April Millsap's mother recalls the day she asked her 14-year-old daughter to text her when she got home from walking the dog. April never did. Instead, she sent a cryptic text to her boyfriend and disappeared.

In 2006, Elizabeth Shoaf was abducted near her rural South Carolina home. The teenager was missing for over a week, when a text message came through that infused hope into the case. Hear the dark details of her frightening ordeal.

When Becky Koster returned home from a night out, she texted her mother Barbara that she made it back safely. But, when Barbara arrived home hours later, Becky was nowhere to be found. In her own words, Barbara recalls the gut-wrenching search.

Iowa home-baker, Justina Rucinski, had just received an email with the largest cookie request of her career. But when the customer arrived at Justina's house to leave the deposit, Justina was brutally attacked and taken away at gunpoint.

One week before Queena Phu's Senior prom, the 18-year-old pulled into her local library to return a book after hours. She was on her cellphone with her best friend, Rachel, who suddenly heard Queena scream--and then the line went dead.