Bryan Kohberger appears to have called his mother at least twice on the day he killed four University of Idaho students, according to a digital forensics expert who looked through his phone and hard drive.

Kohberger, 30, called his mother, Maryann Kohberger, at 6:17 a.m. on Nov. 13, 2022, when arriving at his Washington State University campus home after the quadruple killing.