I'm not fluent in Florida law, but if this article is correct, these men killed a man through gross negligence and I think that constitutes manslaughter among other charges.
https://www.washingtonpost.com/news...ce-now-know-who-fired/?utm_term=.210d866fdcb1
https://www.washingtonpost.com/news...ce-now-know-who-fired/?utm_term=.210d866fdcb1