PC-12 Crash Central Florida
If you look closely at flight aware, there is no sign of CB's in the location. As he gets close to FL260, his speed drops from around 150knots to 60 knots. That indicates he stalled it, then possible spin, hence the turn, then in the ensuing recovery, oversped the airframe and possibly caused some structural damage, which is why the young boy came out of the airplane some distance from the main wreckage. Obviously, he had some control, because he landed right side up intact, except for some of the right wing, and the tail that appears to be missing.
The impact almost looks survivable. As to a midair collision, I think its highly improbable, given that he was in controlled airspace, under Miami centers radar coverage, unless he hit someone on the way down, (not likely).
Real shame, nice looking family, from the photos posted online.