OP, thanks for sharing this case and generating discussion. I created a similar one a few years back after noticing that nobody ever really talked about malpractice cases on here and I just assumed that nobody had been sued. It's a lonely feeling going through your first malpractice suit and not really having a community or close colleagues that you can talk about it. It lends to a great deal of self doubt, obsessive compulsive rumination over the encounter, perceived guilt, depression and anxiety. Surprisingly, we've had a few threads since then where people seem more comfortable sharing their malpractice history and I think it's been great for people (especially new docs) to see it and know that it's not as uncommon as they might have thought and they most definitely are not alone.
What I don't like to see are a million questions about all the nitty gritty details followed by posters criticizing you for any perceived errors in your management or what they would/would not have done "in your shoes". I don't particularly think that's helpful. I also don't think it encourages people to come forward later and share their own experiences. If anyone has ever been through a suit, you become your own medical and legal expert on the subject matter by the time its all over. Hours upon hours of reading and/or prep for depositions, discussions with your lawyer, etc..
Kudos for sharing and asking for advice. Regarding your original question, I did go through a state investigation regarding an EMTALA case awhile back but it was fairly straightforward and involved me speaking to an investigator on the telephone and that was it. From what you've shared, I don't think I would worry that much about it, especially if every case over 100K is automatically investigated.
In the future, I might suggest getting out of Florida altogether. I have a list of states that I won't consider jobs in d/t malpractice environment, regardless of how nice they might be, proximity to family, etc.. Florida is one of my anathema states, as I call them.
In case anyone is curious, my malpractice history:
Sued twice, settled one for below state reporting limits ~60K. I was dropped from the other.