Who carries out investigation for election-related criminal offenses?

PUBLIC LAW NO. 14-76

http://www.fsmcongress.fm/pdf%20documents/14th%20Congress/Public%20Laws/Public%20Law%2014-76.pdf

Section 303. Powers and duties of the National Election Director. The National Election Director shall have responsibility for the overall supervision and administration of all National Elections, and shall perform such duties as are prescribed by law or regulation, which include, but are not limited to, the following:

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(12)to refer to the Department of Justice 1 any case in which he or she determines that a criminal prosecution for a violation of this title may be warranted;

Section 304. Powers and duties of national election commissioners. Subject to the authority of the National Election Director, each national election commissioner shall have responsibility for the overall supervision and administration of the election within his or her State and shall perform such duties as are prescribed by law, which include, but are not limited to the following:

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(8) to review and investigate all registration and election irregularities, and any other alleged violations of this title, and where appropriate, to seek the assistance of other departments and agencies within the National Government with such investigations, provided, that in relation to assistance from the Department of Justice:

a) the Secretary of Justice or an attorney employed by the Department of Justice shall not provide assistance to a national election commissioner unless he or she makes a written request for legal advice, in which the scope of the legal advice sought is clearly identified; […]