During the state's case I remember seeing a stack of HI's receipts that jy had been to within the few months before the murder, I'm assuming HI, like so many large chains, have similar set ups, security, security locations, layout of the hotel, stairwells, monitor's located at the front desk for surveillance, breakfast same,etc.... I think he was ready for this. Sounds to me like he scoped it out a little when he first got there, to make sure it was all clear. And since he was comfortable with what he saw, he went through with it....
Too bad they weren't able to get a hold of him scouting out any other of the HI's on surveillance... because I will bet he came up with his plan at one of those HI's he'd stayed at just before this!!!!!!!
JMO