actually you can be sitting on the ground and kick someone.Bullets drop bodies - if an instant kill, like to the heart - they don't knock them forward or backwards, unless there is already an imbalance in the position of the body at the time of death.
I do have a problem with the position Martin's body was found if, as we are led to believe, he was shot while he was on top beating the snot out of Zimmerman. And that there was no mention by the officer of blood on Zimmerman other than from his nose and back of the head.
Emma,
Any number of factors could account for that. The witness statement says he saw Zimmerman on the ground, with Martin on top of him and kicking him. Now It's pretty hard to kick someone if you're punching him while kneeling over him; you'd have to stand up to do that. The witness lost sight of the two during the crucial last seconds before the shot- he ran inside to call police-how long did that take: ten seconds? Twenty? Thirty? we don't know, when he next saw the two, Martin had been shot and was on the ground.. Did Martin stand up? Did Zimmerman manage to push him hp, before the shot? Did Martin get to his feet, AFTER he was shot, before falling-that would be possible, even with a fatal wound from a 9mm, in my experience. We don't know any of that; no one saw it, (that we know of), except Zimmerman. As for the blood, there's not always a lot of immediate arterial blood spray or gushing, from a gunshot wound.
Now, after all that, the good news is that the autopsy findings will show the entry point and path of the bullet, and from that, it should be possible to reconstruct the relative positions of Zimmerman and Martin, at the moment the shot was fired, which is what REALLY matters. All the rest of this of this questioning of where Martin's body hit the ground, where the blood was, and what that might imply, is useless speculation at this point. The autopsy and ballistic reconstruction will furnish the best evidence available.