Why is the FBI in charge of the investigation of Brian Wells mysterious and violent death?
The FBI has jurisdiction because Mr. Wells was killed by a bomb, and that is a federal offense. That is why the ATF is involved as well. The FBI is in charge of the investigation because that is usually what happens when they come into a case. In this instance it might be unfortunate and inappropriate since the Wells case is at heart a criminal homicide, and homicide cases are best handled by city and state specialists in the investigation of sudden, violent or mysterious deaths.