629.37 When a private person may make an arrest.
A private person may arrest another:
(1) for a public offense committed or attempted in the arresting person's presence;
(2) when the person arrested has committed a felony, although not in the arresting person's presence; or
(3) when a felony has in fact been committed, and the arresting person has reasonable cause for believing the person arrested to have committed it.
Official Publication of the State of Minnesota
Revisor of Statutes