About the lack of footprints.....IF there was a lot of blood, I think it would be very difficult to avoid stepping in it in a relatively small house, no? In a hurried situation, it would be a challenge to carefully step so that one is not in a cast off spot of blood. However, if there was NOT a lot of blood, then it would be much easier to step around it.
I have ZERO knowledge about guns, but I do know of a person who committed suicide by shooting herself in the head, and whatever weapon she used, there was not much blood, it just looked like she had laid her head down on the table and went to sleep. I am guessing there are handguns that make wounds that are lethal if aimed in right part of the body, but do not leave a horribly messy scene. Is that true, and could that be the case here?