I hope the NTSB and Diamond fully evaluate the survivability (or in this case non-survivability) aspects of this occurrence. A stationary aircraft of recent design, flipped over, should be survivable with little or no damage to the occupants. Were they appropriately restrained? Was there intrusion of any outside object into the pilot/passenger area, causing injury? Did the roll bar (in the case of Diamond designs located behind the front seat area) appropriately protect the pilots? A sad occurrence, for sure.