Billie held a media press conference outside her home in Colorado City Monday where she read a timeline of events directly before and after Hailey vanished late last month.
The timeline covers from noon on December 26 up until 3 p.m. on the 28th, when Billie reported Hailey missing.
"I was kind of upset that Hailey hadn't called me...Shawn did let me know she was staying the night with her friend," she said.
Dunn said she is disappointed with the way law enforcement has handled the investigation.
"I do not understand why they seemed to have disregarded all of the witnesses who have come forward to say they saw Hailey. I also don't understand law enforcement's reluctance to publicly name any other persons of interest," she said.
Kampfer said he will not comment on persons of interest other than Shawn Adkins as not to jeopardize the investigation.
"We don't want to tip our hats to anything," he said.
Kampfer says police are working nonstop on the investigation, following up on leads, putting up billboards, and searching areas around Colorado City.
"Our officers have been working around the clock. We're still working and building a criminal investigation and that's basically where we're spending most of our time at," he said.
Still five weeks into the investigation, Billie continues to hope Hailey will walk through the front door.
"There's not a minute that goes by that I'm not praying for you or crying, wishing you were in my living room," she said.
Billie's timeline also includes a neighbor that said she saw Hailey at 8:30 p.m. on December 27. Kampfer said investigators have not been able to confirm the sighting.