Apparently no one wants to go here, but surely the NTSB is investigating a possible suicide. Possible. As others have noted this event is inexplicable. A fairly experienced pilot with probably dozens or more ops from the E 34th St heliport, who's been flying corporate equipment around NYC for years gets lost minutes after departing the heliport? Then climbs into the ovcst and dives nearly vertically...yes, it could be a medical anomaly, but something ain't right here. I'm not buying spatial disorientation.