http://jodi-arias.wikispaces.com/Horn+Final
Horn: Yes, the entire brain was decomposed.
Martinez: Is that one of the reasons that ..that.. did that hinder you in attempting to find out what a trajectory was?
Horn: Yes, in addition to lack of hemorrhage in the wound to begin with. If the hemorrhage had still been there, I might have been able to identify that, even in a decomposed brain, but there was really no hemorrhage and the brain was uniformly green-grey and soft.
Martinez: And if there is no hemorrhaging there, that’s what you previously indicated..
could indicate that he was already dead?
Horn:
Yes.
Martinez: And if the bullet goes in this direction, and the frontal lobe is there, is it your opinion, even though the brain was in that tapioca pudding kind of state, that you can at least give us an indication as to what the trajectory was, and I know you previously indicated something about simple geometry..
Horn: Yes, if you draw a line straight from the right front part of the head towards the left cheek, which is in this area here ...
Martinez: Go ahead ..go ahead and draw the line if you can, I don’t know exactly how to work it ...
Horn: The trajectory is this way and the cheek is in this location, so the bullet ends up here. So you can see that it enters the skull here, and why we have a larger fractured exit point is because the bullet has begun to tumble and deform, and you get a larger exit as the bullet is deformed by the bone.
Martinez: So it isn’t a situation where the bullet then goes down in this direction, but it actually keeps going this direction, is that ..?
Horn: Yes, it goes down below the skull into the face.
Martinez: And if it goes down in that direction, do you have an opinion as to what would have happened once that shot struck Mr. Alexander in the front portion of his face?
Horn: If it had been the last wound nothing,
because he was already dead. If it’s the first wound and it’s passing through his frontal lobe, that bullet is tumbling and deforming and it’s causing a large temporary cavity which is involving areas of brain, even away from the frontal lobe,
that this person would have collapsed.
Martinez: Is there something to a bullet involving, for example, concussive affect, in other words , it’s not just the item that is going through, but is there any sort of, for lack of a better term, radiation of energy that goes from there?
Horn: A bullet as it passes through something soft like brain, will create what is called a temporary cavity, and you see that in ballistic gelatin when you test fire a bullet through gelatin. You see it in the ballistic labs. It’s the same concept in the brain. You get a very large open area that squashes the brain around it into the skull around it, and then that will collapse back down ... and you may be able to see a wound track, but in this case, we don’t. But it damages areas of the brain away from the frontal lobe, even only passing through that one part of the brain, other areas of the brain are involved and damaged.
Horn:
He would have been incapacitated.
Martinez: And would this have been an immediate sort of reaction, seconds?
Horn: Yes.
Martinez: By seconds, how many seconds would you indicate?
Horn:
A second or two. He would collapse to the ground and be unresponsive.
