the real hero, in my opinion, is the person who made the initial call and the tip. reporter: the sheriff says a helpful tip led them to his personal diary spelling out their plans. they also say they found a homemade explosive in her home. i just couldn t believe it. it was i knew both of those kids. they both rode my bus. reporter: on mccurley s social media pages are signs there may have been an issue. images celebrating the columbine high school killers. another picture of columbine killer dylan klebold with the message outrun my gun. police believe that mental health issues may be responsible here. and they re not revealing tonight who called this in. david? steve osunsami with us tonight. steve, thank you. next this evening, to a new development in the harvey weinstein case. today, he sued his former company for records, as he now prepares to defend himself. it comes as diane sawyer sits down with ashley judd. her first television interview. judd was the first to com