Still a mystery. Been waiting for more information. Someone posted the ATC recording on YT:
https://www.youtube.com/watch?v=t-X9m1XpPmI
They stopped comm'ing a few miles out but seemed fine until then. Edit: also just noticed that they had the altitude reporting in there. Was at 100 feet a mile out. No fire, so maybe fuel starve?
Was glad to hear everyone survived. I almost wonder if that tree actually saved their lives.