That could be true. I can see it now. Police arrive at a residence and go lady why is your husband/boyfriend dead. Well she says, he hit me see this slightly darken area on my arm that a bruise. Well,I guess we are going to have take her word for it because there will be no one else to question. I really wish legislators would think on these topics. Maybe its a good bill, I didn't sit through all the hearings. But it sounds bad. Also before people start calling me the Ted Kennedy of gun control on FR, just remember this stuff if it happens can have blowback. Blowback that might result in legislation that makes gun rights more difficult. Just saying.
Here is a thread I found on the Florida law, there's probably many more.
http://www.freerepublic.com/focus/f-news/1496663/posts
I don't think that's how it would work. I'd be extremely surprised if this bill changes the ordinary rules of evidence. Even though under normal circumstances you're innocent until proven guilty, if you actually do the deed, then I believe some burden is on you to show that it was justified. I'm pretty sure that's how it works with cases of self-defense currently. This bill would most likely only expand the types of cases where the self-defense defense can be invoked, rather than actually change the rules of evidence in those cases.