Ok, but that’s begging the question. You could just as easily say that can’t be Lovelady walking down the street because Lovelady is still on the steps. The Couch film is black and white so you can’t actually see a red shirt.
Hi John, You can tell the difference in black and white film of a plaid shirt versus a white shirt versus a brown suit. Here is Altgens 6:

You can tell that Lovelady letter F is wearing a plaid shirt; you can tell that letter E Shelley is wearing a brown suit; and you can tell that Molina
letter A is wearing a white shirt. I cannot find them in Darnell. I am confident that they --- Shelley and Lovelady are walking together down the Elm Street Extension. If you can, please point them out in Darnell. Thank you for your reply like normal! Sincerely yours, Michael

In this Couch frame Shelley looks like he is wearing a brown suit not a black one. Lovelady you cannot make out the plaid, but it is not white.