On April 12, 1975, United States's Ambassador to Cambodia John Gunther Dean, offered high officials of the Khmer Republic political asylum in the United States, but Sirik Matak, Long Boret and Lon Non, along with other members of Lon Nol's cabinet, declined - despite the names of Boret and Sirik Matak being published by the Khmer Rouge in a list of "Seven Traitors" marked down for execution.