Adkins is quoted as saying he would "never ever do anything to harm Hailey."
In an interview done with KTAB's Priscilla Luong last week, Adkins said many similar things.
Adkins told Hailey's mom, Billie Dunn, on Dec. 27 that the 13-year-old was going to spend the night with a friend. Billie Dunn reported her missing on Dec. 28 when she did not return. The friend never saw her, and didn't know Hailey planned to come over. Hailey took nothing with her, investigators in Colorado City determined.
The fact that Hailey never packed any bags leads family and friends to believe that she didn't leave intentionally.
"That raised some red flags to us, and really, really worried us," Adkins told KTAB on Jan. 4.
Adkins said he has been praying for Hailey's return every day.
Investigators are looking at several persons of interest, Senior DPS Trooper Sparky Dean said, but he named only Adkins. No arrests have been made.