Corrected entry: In the flashback scene, where we see the abusive husband shooting his wife in the head against a wall in their home, Sarah and Grissom do not discover any plastering or other repair to the wall (although they do discover the victim's blood). However, during the victim's autopsy scene, we learn that the shot to the victim's head was through-and-through. (This is an important plot point, since it means that the bullet's distinctive composition is not immediately discovered.) Wouldn't the bullet have gone into the wall? Is there any realistic way the murderer could have repaired the damage without Sarah or Grissom discovering it?