and he would walk into, say, the student lounge, and other -- everybody would be like, "hey, it's daniel," you know. >> reporter: hmm, nice guy? >> yeah, very nice guy. >> a nice guy who was telling detective ellzey he was troubled about nathan. and then, when the detective dug a little deeper among other people who knew nathan, he began to hear a different take on the kid who was supposedly too shy to kiss his girlfriend. >> some people would describe him as a little bitty, scrawny kid, kind of introverted who just lived and breathed his artwork. other people would say, "the guy had a temper." >> ashley said she'd heard the same thing. >> one of my friends would say just like you know, "i would never want to see nathan angry"" and i asked him, "why?" and they said, have you ever seen him play a video game? because he just kind of pops if he doesn't get something."