A former Diet member's secretary has apparently committed suicide after being interrogated by prosecutors in connection with suspected violations of the Political Funds Control Law involving a dentists' association, it was learned Monday.

The man, whose name was withheld, was found dead Friday in his Tokyo home. The circumstances of his death led investigators to suspect that he killed himself.

The man had previously worked for Yukihiro Yoshida, 42, a former House of Representatives member with the Liberal Democratic Party. Yoshida failed to win re-election from the Aichi No. 3 district in November's general election.

Prosecutors have determined that the political arm of the Japan Dental Association failed to publicly report 20 million yen in donations made to Yoshida.