A digital forensic expert said Bryan Kohberger had just 18 contacts stored in his phone and used incognito browsers to hide his internet search history prior to the murders. Bryan Kohberger's Search History Revealed After Investigators Say He Tried to Erase Digital FootprintMore than a year after Bryan Kohberger pled guilty to killing four University of Idaho students, the convicted killer remains an enigma. RELATED: Bryan Kohberger Defense Expert Argued Evidence Suggested Two Killers: Court DocsKohberger also regularly used incognito browsers to hide his search history, yet investigators were able to find traces that were left behind. RELATED: Idaho Murder Victim Ethan Chapin’s Mom Releases Emotional Statement After Missing Killer's SentencingWhat Evidence Led Investigators to Arrest Bryan Kohberger? Xana Kernodle, Ethan Chapin, Kaylee Goncalves and Madison Mogen Photo: InstagramWhere is Bryan Kohberger Now?