Not taking up for HKS, but that is a little ridiculous to state that the bumb was there at the hotel 5 minutes before the 911 call. How does anyone other than HKS know exactly how long it took him. And even if the drive was 20 minutes, you have to add more minutes to park your car in the parking area, pass it over to a valet parker and then get up to the 6th floor and run/walk to the room.
But it is good to know that the bumb had a hangover.
What does a hangover look like? Maybe wrinkled clothes like he slept in them, messed up hair, didn't wash his face, etc.