It's been more than a month since anyone has seen or heard from 20-year-old Heather Elvis, who vanished from her Myrtle Beach, South Carolina, apartment last month. She last communicated with her roommate very early the morning of December 17, then she was gone.
Her car was found abandoned eight miles away at a boat landing.
Her dad, Terry Elvis, recently wrote a heart-wrenching letter about the search.
He talked with HLN about what his family is going through, and said it's still difficult for him to sleep because he's thinking about his daughter. Elvis described her as "everything you could want in a daughter."
He also says he fears that someone who knew her, or one of her friends, may have "betrayed" her. Her dad says the place the car was found is somewhere she would not go alone in the middle of the night, but the boat ramp is a place where kids would hangout.