Me. Const. art. IX, § 10

Tenure of sheriffs. Sheriffs shall be elected by the people of their respective counties, by a plurality of the votes given in on the Tuesday following the first Monday of November, and shall hold their offices for 4 years from the first day of January next after their election, unless sooner removed as hereinafter provided. Removal of sheriffs from office and replacement. Whenever the Governor upon complaint, due notice and hearing shall find that a sheriff is not faithfully or efficiently performing any duty imposed upon the sheriff by law, the Governor may remove such sheriff from office and appoint another sheriff to serve for the remainder of the term for which such removed sheriff was elected. All vacancies in the office of sheriff, other than those caused by removal in the manner aforesaid shall be filled in the same manner as is provided in the case of judges and registers of probate.