There Is a Newer Version of the Utah Code
Utah Title 77 — Utah Code Of Criminal Procedure :: 77-7-3 — By Private Persons.
77-7-3. By private persons.A private person may arrest another:
(1) For a public offense committed or attempted in his presence; or
(2) When a felony has been committed and he has reasonable cause to believe the person arrested has committed it.
Enacted by Chapter 15, 1980 General Session