Between Flight Aware and VasAviation, folks can get real time data after a mishap, with some amazing features that aid studying crashes with A/G, G/A and even CTAF transmissions, along with flight profile plan view traces and airspeed/altitude data. I’ll wager the NTSB investigations, when they publish the fact that they didn’t travel to the crash site, are performed with this data. Some of the video images from airport surveillance cameras will help immensely.