A private person may arrest another:
1.  For a public offense committed or attempted in his presence.

Terms Used In Idaho Code 19-604

  • Arrest: Taking physical custody of a person by lawful authority.
  • person: includes a corporation as well as a natural person;
Idaho Code 73-114
2.  When the person arrested has committed a felony, although not in his presence.
3.  When a felony has been in fact committed, and he has reasonable cause for believing the person arrested to have committed it.