ajar and she almost went in. i wonder, you know, is that -- just think how lucky she is, if that door is booby trapped that she didn't walk in. >> reporter: that's remarkable. possibly the music was intended to draw something inside the apartment. possibly the music was meant to set up an alibi if people said they heard music from his apartment, that could have been a distraction if he intended to get away at all. it's hard to tell what was going on in his mind and whether the music was on a timer through a computer, so many questions need to be answered, greta. >> mike, tell me a little about the area eye understand that the neuroscience building, the university of colorado is right near there. >> reporter: i don't know about the proximity of the university, but there is a high school nearby. what we have goingn at the high school, for all the unfortunate people in the surrounding apartment buildings, that's where they are forced to