Linda says her life became a living nightmare on November 8, 2015, when her 15-year-old daughter went out to walk the dog and didn’t return.

“The night that she disappeared was the worst night of my life. She took our dog outside and she just vanished. There was no trace of her anywhere,” Linda says. “She was gone for about 20 minutes, and I knew something was wrong. My daughter and I are very close. I knew that she did not just run off. I knew something bad had happened.”

WATCH: Teen Describes Events That Led Up To Her Running Away From Home With Man She Says She Met Online

In the video above, Linda recalls the events of the night and the desperate search to find her daughter. And, hear how her daughter was found 23 days later, 700 miles from her home with a 41-year-old man whom she reportedly met online.

WATCH: Teen Gives Account of When She Ran Away with a 41-Year-Old Man

On Thursday’s episode, the teen speaks with Dr. Phil. What does she say drove her to run away from her house and get in the car with a man she barely knew? And on Friday, hear more from Linda and her fiancé, along with the teen’s father. Check here to see where you can watch.