Cop should at least be facing reckless endangerment, if not attempted murder.
The review board found his conduct was not reasonable; so, it’ll be up to the prosecutor (which I’m sure in FL is an office eager to go after cops). The other officer, who began shooting after the officer wearing the bodycam in the OP began shooting, was found to have acted reasonably.
Essentially, you can’t think an acorn is a bullet and get away with shooting at a detained and secured civilian. But, if another officer on scene thinks, even unreasonably so, that an acorn is a bullet and starts shooting at a detained and secured civilian, you can too. If this doesn’t make a lot of sense to you, take that as reassurance that your critical thinking remains, at least partially, intact.