RSBM
Originally Posted by SnooperDuper 
Susan Clairmont ‏@susanclairmont 30s30 seconds ago
Now mist spatter to left of glovebox on dash. Small spatters right into glove box. Most of those spots are unaltered.
Gunshot spatter - includes both forward spatter from the exit wound and back spatter from the entrance wound. Gunshot spatter will vary depending on the caliber of the gun, where the victim is struck, whether the bullet exits the body, distance between the victim and the gun and location of the victim relative to walls, floors and objects. Typically, forward spatter is a fine mist and back spatter is larger and fewer drops.
http://www.forensicsciencesimplified...rinciples.html
RSBM
RSBM
Sorry to mash up these different posts, I hope the quotes came out properly. (Forgive the grisly visuals)
It sounds like the blood spatter that was not altered by clean up supports the idea of a fine mist from forward spatter (coming from the exit wound) being found to the left of the glove box. In my opinion, DM would have had to have climbed into the backseat to have shot TB and left exit wound spatter to the left of the glovebox.
I think Dungey may have really screwed MS by asking if there was back spatter in the driver's area. I think back spatter would have been found in the unaltered areas like to the left of the glovebox, if the shot came from the front seat.
My opinion only.