The California man charged with the attempted assassinationof Supreme Court Justice Brett Kavanaugh googled the “most effective place to stab someone” before showing up at the conservative judge’s home with a stockpile of weapons, according to newly released details.

The revelation was included in an FBI search warrant obtained by Fox News that shed light on other disturbing internet searches by Nicholas John Roske, 26, and alarming conversations he had with online strangers ahead of his alleged ill-fated plot to kill Kavanaugh.