Me. Rev. Stat. tit. 15, § 152

The term "fresh pursuit" as used in this chapter includes fresh pursuit as defined by the common law, and the pursuit of a person who has committed a crime punishable by a maximum term of imprisonment equal to or exceeding one year, who is reasonably suspected of having committed such a crime or who is reasonably suspected of operating a motor vehicle while under the influence of intoxicating liquor or drugs. It shall include the pursuit of a person suspected of having committed a supposed crime punishable by a maximum term of imprisonment equal to or exceeding one year, though no such crime has actually been committed, if there is reasonable ground for believing that such a crime has been committed. Fresh pursuit as used in this chapter shall not necessarily imply instant pursuit, but pursuit without unreasonable delay.