Proposing another possibility here. Healthy fit guy, confident takes young attractve girl for an aerobatic flight/adventure wth the CTA step 3000( allowing 500' clearance) in a high perf A/C that are known to bite if pushed hard enough under certain maneuvers especially at low Alt. Performs a stunt that goes wrong. Not enough height to recover, two dead, showboating perhaps?
I guess at the end of the day the authorities may never know the cause -
