Trevor XI, a controversial Sierran-Serbian political figure was quickly identified as the mastermind behind the assassination who was being monitored by Sierran intelligence. Trevor XI's whereabouts are currently unknown although as of December 24, the Federal Bureau of Investigation and the Royal Bureau of Investigation uncovered thousands of files and other documents from Trevor XI's homes and communication devices that confirmed his connection with the assassination. It was found that Trevor XI had the financial and political backing of both the Turkish and Mexican government, both entities which were hostile to America and Solomon. Both governments denied any involvement as well as discrediting any rumors that Trevor XI is seeking refuge in either country.