http://www.theagitator.com/autopsy.pdf
Notice in section three that the lethal entrance wound is described as "irregular" and labeled a "reentry wound" which indicates that the bullet went through a closed door. Another bullet was found lodged in the door trim.
Thanks for the update.
Shootings through closed doors are generally not justifiable, but not prosecuted as capital murder either. If Maye fired through a closed door, that would seem to support his claim that he didn't know it was the police.