He was flying his Long EZ and his licence was out of date. I think the proximate cause was trying to switch between fuel tanks and losing control of the aircraft whilst doing that, though there was some debate about wether the tank he was switching to fess full and also wether hypoxia was an issue. He’d been done for drink driving a few times too but I don’t think there was any evidence he’d been drinking at the time of the crash. All very sad.