On May 11th, 2018 a request was made by one of the many 9/11 for truth platforms which is endorsed by nearly 3000 architects and engineers to the US congress to reopen a new 9/11 investigation.
This is called the Bobby McIlvaine Act which acts in the name of many families who lost at least a relative during the 9/11 attacks. According to his platform over 100 representatives of congress have been reached in the past few weeks.
They are going to attempt the same thing this week but congress keeps ignoring the requests.
Would it be possible for a judge, lawyer, attorney general, etc. to start a new investigation or at least to subpoena the people who were in charge by that time, or is Congress the only way? Are there any other legal procedures to start a new investigation apart from Congress?