Hall was never charged with his crime, creating a mystery that continues to this day. The official explanation for the decision not to prosecute him has been released.<ref>http://cryptome.org/fbi-nsa.htm#IV.B</ref> | Hall was never charged with his crime, creating a mystery that continues to this day. The official explanation for the decision not to prosecute him has been released.<ref>http://cryptome.org/fbi-nsa.htm#IV.B</ref> |