Me. Rev. Stat. tit. 15, § 214

The arrest of a person may be lawfully made by an officer or a private citizen without a warrant upon reasonable information that the accused stands charged in the courts of another state with a crime punishable by death or imprisonment for a term exceeding one year; but when so arrested, the accused must be taken before a judge or magistrate with all practicable speed, and complaint must be made against the accused under oath setting forth the ground for the arrest as in section 213. Thereafter the accused's answer must be heard as if the accused had been arrested on a warrant.