“He had his parents saved as "Mother" and "Father" in his phone, says Barnhart, and would often call his mother first followed immediately after by his father if he did not get an answer.
"And he would go back and forth texting: 'Father, why did mother not respond? Why is she not answering the phone?" Barnhart says.
Barnhart notes that Kohberger had completely powered his phone off between 2:54 a.m. and 4:48 a.m, a move likely meant to protect himself while he committed the murders.
In the end, it was a move that proved to be incredibly revealing, she explains.
"
When he powered it off, it was from a human pressing a button, and the battery was at 100 percent charged," Barnhart says.
The digital forensics team who worked on the Bryan Kohberger case tells PEOPLE that he spent over three hours on the phone with his mother after killing four University of Idaho college students
people.com