Reports from American Samoa say police probes into the activities of a former cabinet member, Tafua Fa'au Seumanutafa, have been extended to members of his family.
He is alleged to have abused his position as chief procurement officer for his personal benefit.
According to local press reports his wife, son and daughter-in-law have also been implicated.
Seumanutafa was forced to resign as procurement officer.
The attorney general has declined to comment on the case.
Last week, the governor said all those found guilty would be prosecuted even if they are part of his administration.