[Alberta's Child]

Without knowing all the details I'd look into the following:

1. Did it really take the police over an hour to get into his room?

2. I've seen reports suggesting that he had set up some gun positions outside his room in the hall, and rigged his door with explosives as well. Perhaps he spent the 50+ minutes setting all of this up? He wouldn't have been able to do a lot of this BEFORE he began shooting without attracting the attention of other hotel guests and staff.

[AliVeritas]

Indeed.