I'm completely sure that you've missed the sarcasm in my use of 'pretty sure'. And I'm completely sure that #2 in the lineup (aka Lee Harvey Oswald ) was fingered by Helen Markham as the one she saw killing the officer. And I'm completely sure a few good men in and around the Tippit scene also fingered Oswald as the #2 man in the lineup.
Good for you that you are completely sure. So now you can drop the "I'm pretty sure" crap.
Just consider this; I'm beyond sure that, even if I did not witness the actual crime, if I were placed in front of a 4 man line up like that I would pick Oswald as the most likely one as well.
Too bad that none of the line up witnesses were ever questioned by a defense lawyer because it is beyond a shadow of a doubt (IMO) that their identifications would have been destroyed on the stand.