The red line is the trajectory of the first bullet that allegedly grazed Trump’s ear. Assuming that the bullet passed closed enough by Trump’s right side of his face, which part of his face would the bullet have grazed? His cheek? The bottom of his ear? The top of his ear? Other?
The bullet goes from left to right and has a descending trajectory so not inconsistent with the official story. That said, based on this trajectory I don’t see how the bullet could have grazed the upper part of Trump’s ear. Maybe that’s why the FBI director refused to state that Trump got it by a bullet in front of the Committee.