Bryan Kohberger's Amazon shopping records and "click activity" are damning for his defense, after he allegedly bought a Ka-Bar knife before the Idaho murders.

New court filings contain bombshell disclosures about Bryan Kohberger’s purchase history and academic study of crime scenes.

BOISE, Idaho - Accused killer Bryan Kohberger bought a Ka-Bar knife with a sheath and sharpener on Amazon eight months before a similar knife sheath was found at the scene of a quadruple murder.