Why the hell is a car wreck becoming a federal case?
You have to be a lawyer to know what is going on. As a non lawyer here are a few observations. At the time of the crash the driver was likely engaged in interstate commerce between MA and NH bring the feds into play. Another possibility, is the people that were killed and injured were federal retirees and active duty service members. It is big enough of an accident the NTSB is going to review it.
That is a very good question. Since its NTSB, I could see a safety angle, I suppose. Maybe. Anyone heard if the FBI is involved, DEA, FBI, ATF?
It isn’t, except to the extent that the crash involved a trucking company which is an interstate business, and since the crash involved a commercial vehicle apparently that brought in NTSB investigators.