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

Here is BJ Martin in the Moorman photo, circled.

And here the lines for Martin's bike and Hargis' bike, which you can easily derive by drawing a line from him to the back part of his bike. 

They are two different lines. Two different parallel lines. You can't go from the back of Hargis' bike to the front of Martin's bike. They're on different tracks.