The problem there is that I don't believe the prosecution charged anything other than Murder 2. So if the can't prove murder then the jury must acquit. They can't convict him of any other crime.
I’ve read that in Florida the jury can consider a lesser charge automatically. I don’t know if that’s true, but I’ve read it on some thread someplace.
The legal commentator on the local FL CBS channel said this afternoon that after all the evidence has been presented and one party or the other doesn’t think the case has been made, they can put in a lesser charge for the jury to consider.
Personally, when he was talking about that it made my blood run cold because a lesser charge, i.e., manslaughter, could give GZ many years in jail and might seem a ‘split the difference’ verdict to the jurors who would be inclined to acquit if the only option is Murder2.