RSA 247:9: Detention of Offender.

The conductor, baggage master or brakeman on the train may remove such person to the baggage car, and there detain him until he arrives at his destination, or until he is placed in the custody of an officer for lawful detention; and the person in charge of such waiting room may remove such person from the car or waiting room, or detain him until he is placed in the custody of an officer.