I just realized I get a Denver TV station (a superstation I guess, whatever that is) over satellite.
They are showing the shooter's evacuated apartment block live right now. Some guy with "FBI" on his vest is up on some sort of a lift on a utility truck, and he just broke all the glass out of his window and then ripped the shades out of the window, apparently so they can get a look inside before they enter the apartment.
Heard on the news (still listening to that Denver superstation) that when they looked in the window, they did
see a boobytrap. Guess it looks pretty scary.
Not a lot of details given about it, but from the way they talked about it, I get the impression that if they open the door to his apartment, the whole apartment will blow up.