Maybe we can conduct an exercise to establish common ground and see what can be concluded. I would include Dan in this (and anyone else who would like to participate rationally).
First question, were remnants of a lunch, an empty Dr Pepper bottle, chicken bones, including an unfinished piece, a lunch sack and Doritos bag found on the sixth floor by police about half an hour after the shots?
I'll start the ball rolling with Luke Mooney's next day 'Sheriff's Report':
"I then went on back to the 6th floor and went direct to the far corner and then discovered a cubby hole which had been constructed out of cartons which protected it from sight and found where someone had been in an area of perhaps 2 feet surrounded by cardboard cartons of books. Inside this cubby hole affair was three more boxes so arranged as to provide what appeared to be a rest for a rifle. On one of these cartons was a half-eaten piece of chicken. The minute that I saw the expended shells on the floor..."To me this report isn't ringing any alarm bells. A description of the SN and a rifle rest. It seems that the half-eaten piece of chicken (I'm assuming this is a piece of fried chicken on the bone) is his first real observation. However, no mention of a lunch bag, soda bottle, Fritos etc just the chicken piece.
That it was half-eaten cries out that the owner was interrupted whilst eating it. In my mind it also demonstrates a lack of professionalism if we are talking about a trained assassin here. On a job this big it is difficult to imagine a professional hitman bringing his lunch with him.