A subsequent federal investigation into the incident found that the error coins had been struck accidentally, but two former Mint employees were guilty of selling some of the dollars, resulting in imprisonment and fines for both individuals. In 2002, Mint officials announced that two of the ten coins then reported had entered circulation through legal channels, but the other eight were of dubious origins and might be seized. However, as of 2011, the federal government has not attempted to seize the eight examples considered of dubious origin.