[caligatrux]

One of the things I find curious about the scene is that I don’t see any signs that he was wearing any kind of hearing protection.

[RC one]

He would have been deaf and yet he detected Jesus Campos outside his door.

...because he had surveillance cameras set up.

But all accounts indicate the cameras weren't recording when the swat team finally made it to the door.

[RitaOK]

I wondered about that, as well. Perhaps it was blown across the room when he shot himself, but right now it does remain a good question.