I have never bought into the Sitzman account of a black couple sitting on the bench. Anyone/Couple sitting on that bench would have had their upper torso visible above the short wall. This would have been captured on Willis 5, Moorman, etc. I believe that Sitzman possibly saw a couple sitting there Before the JFK Limo came down Elm St and she mentally screwed up her when she saw that couple there. Some people are just not very good with respect to "time". This also goes for witnesses time stamping the elapsed time for shots fired, time between shots, etc.