No Bill. It's what BRW thought he might be implicated in given he was in the SN about 5 minutes or so before the shots. Also his chicken remnants and pop bottle had been subsequently referred to as the "assassin's lunch". The fact that all three said in various statements that he came up with them on the elevator to the 5th floor.
BRW testified that he arrived on the 6th at noon to eat his lunch, and was there '10, 12, 15' minutes I recall. Seems that gives him time to go downstairs then go up to the 5th with the others. And enough time for Oswald to show up in the SW corner, spotted playing soldier boy.