RSA 644:1 Riot.

I. A person is guilty of riot if:
(a) Simultaneously with 2 or more other persons, he engages in tumultuous or violent conduct and thereby purposely or recklessly creates a substantial risk of causing public alarm; or
(b) He assembles with 2 or more other persons with the purpose of engaging soon thereafter in tumultuous or violent conduct, believing that 2 or more other persons in the assembly have the same purpose; or
(c) He assembles with 2 or more other persons with the purpose of committing an offense against the person or property of another whom he supposes to be guilty of a violation of the law, believing that 2 or more other persons in the assembly have the same purpose.
II. Any person who refuses to comply with a lawful order to withdraw given to hi