"We analyzed this data with the assistance of outside forensic experts and found that it appears to be Yahoo user data" How the forensic experts could have ana

"We analyzed this data with the assistance of outside forensic experts and found that it appears to be Yahoo user data" How the forensic experts could have analysed? based on the log data? my another question is, just assume if yahoo is trying to dump the experts, can it be possible? or else, still the experts be experts to make sense out of it?