we all feel like, oh my gosh. >> buddy, robert lopez, had noticed weird behavior.to this restaurant, the slump. it is well-known against bill. it's right next to the football stadium. our tab ran up to $70, he picked up the whole tab. we asked him, pedro, why would you pay for our whole tab? you pay for all your classes out of pocket? he said yeah, i'm not worried about it, i won't need this money soon. >> whoa. >> did that give you an insight into where he was headed? >> that was when we realized, you know, he is not doing okay. >> was pedro suicidal? all the more reason erica and christian to keep their happy romance quiet. >> i was just concerned that i was going to push him off the edge. i don't want to go off that night, knowing that i was dating one of our mutual friends, and him thinking, you know, i am just gonna end my life right now. now with christians disappearance, the cat was out of the bag. at the university police department that day, erica blurted it out. to page right there in the room. >> do you know question? >> yeah, yeah. >> how do you know hi