Agreed. From NTSB's website[0]: "In cases of suspected criminal activity, other agencies may participate in the investigation. We do not investigate criminal ac

Agreed. From NTSB's website[0]: "In cases of suspected criminal activity, other agencies may participate in the investigation. We do not investigate criminal activity. Our focus is solely on transportation safety and determining probable cause. If a transportation tragedy is determined to be a criminal act, local law enforcement or the FBI becomes the lead investigative body." The FBI opening a case does not guarantee that someone will be charged with a crime per se, but the timing of this announcement coming weeks after the collapse, not hours or days after, suggests its not simply a procedural matter. Rather that something was found and given to the FBI to investigate further. 0: https://www.ntsb.gov/investigations/process/Pages/default.aspx https://www.ntsb.gov/investigations/process/Pages/default.as...