Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

Amy Joyce had ID'd the Bieb in this image from the Garage. 

And I confirmed it with the image from Parkland.

That looks like a match to me. So, where was the Bieb in this image?

He was behind Leavelle on the left in his Easter suit and completely obscured by him. You can see the Bieb emerge from behind Leavelle in the NBC footage. 

Somebody sent me this picture of the ambulance. In this case, both of the middle seats are folded down, but on the day in question, the right middle seat remained upright to provide seating for the Bieb. But you can plainly see that there was no room in the vehicle for Graves, unless he rode on the roof.