Hi Dan and Alan, I hope that you both are doing well. I can only concede at this time that Billy and Bill did not encounter Gloria Calvery. I see no problem with them walking and then Billy running, and it appears that Bill is starting to before they are out of the film. Sincerely yours, Michael
At least you can see they aren't walking together.
In his affidavit, taken a couple of hours after the assassination, Shelley states that after he heard the three shots he ran across the street "to the corner of the park" where he runs into Calvery coming the other way. She was crying and told him JFK had been shot. Shelley then returns to the TSBD building steps, presumably following Calvery, who Lovelady reports, comes running up to his position on the steps.
In his WC testimony Lovelady makes it clear that he is still on the steps when Calvery comes up to him and tells him JFK has been shot. It is after this he and Shelley head towards the railroad (something they both omit in their affidavits).
IMO, the clip in question shows Calvery at the steps with Shelley returning to the steps.
The identification of Shelley and Lovelady you are proposing is strained for a couple of reasons.
1) The men aren't walking together in the Darnell clip.
2) For Lovelady to be one of the men he would've had to have had his encounter with Calvery
before this moment. This is highly unlikely.
These points are definitely worth considering.