The courts have ruled that the info stoered in these belongs to you, and if you are involved in an accident, just file an injunction to prevent supoenaing the info.
^ Correct, but wrong. In California the info does belong to you, but court orders can easily be used to obtain the data. Many states don't have legislation, and thus the info belongs to the car manufacturer (but didn't you BUY the car?). I haven't found a single case where the EDR data was refuted because they could not legally obtain the info.
Just last week the Indiana State Police arrested a guy for manslaughter. Seems he lied about not running a stop sign. The box revealed that up to the crash, he was driving 32mph, had not applied his breaks and was wearing his seat belt. Charges were filed in Valporasio, IN.