New Hampshire’s common law (also called case law or judge-made law) has long allowed private citizens to arrest persons whose actions threatened public order. These cases make it clear that private persons can make warrantless arrests of those who have committed felonies and those who have committed misdemeanor breaches of the peace in the presence of the arresting party. In addition to case law, there are some New Hampshire statutes that relate to private citizens having authority in limited situations to arrest someone else.
Generally private citizens are discouraged from making arrests. One reason is that when a citizen makes an arrest there are fewer constitutional protections for the offender, since citizens make arrests without warrants. In addition, there are several serious potential risks for the citizen including possible criminal liability, violation of an offender’s constitutional rights if the citizen makes a mistake in the arrest, potential civil liability for torts (civil wrongs) the citizen might commit while making the arrest, and the risk of serious physical harm to the citizen.
Criminal Practice and Procedure by 
Personal Injury, Tort, and Insurance Practice by 
Prosser and Keeton on the Law of Torts by This site is maintained by the law librarians of the John W. King New Hampshire Law Library.
Our guides are for information purposes only and are not comprehensive.
They are intended as starting points for your legal research, to illustrate the various sources of the law, and to provide guidance in their use.
NH Law About ... is not a substitute for the services of an attorney.