The gruesome quadruple murder of four university students in Moscow, Idaho remained a mystery for seven weeks until law officials were finally able to track down a suspect, Bryan Kohberger. Law officials quietly collected clues that eventually led to Bryan's arrest in Pennsylvania at his parents' house. Police say Bryan's DNA from a knife sheath was left at the crime scene, and he allegedly went to the victims' house 12 times before their murders. Forensics expert Joseph Scott Morgan, Former FBI Special Agent Jonathan Gilliam, Sr. Reporter for DailyMail.com Caitlyn Becker, and trial attorney Mercedes Colwin help Dr. Phil analyze these eerie details about the suspect. Plus, NewsNation Senior National Correspondent Brian Entin also reports live from Idaho to discuss additional information about this horrific case.