Additional Provisions Regarding Criminal Procedure — California Penal Code — Arrest, By Whom And How Made — Arrest without warrant in possession of peace officer at time of arrest Date: 15 Sep 2016 TEXT PDF Current through the 2016 Legislative Session An arrest by a peace officer acting under a warrant is lawful even though the officer does not have the warrant in his possession at the time of the arrest, but if the person arrested so requests it, the warrant shall be shown to him as soon as practicable. Ca. Pen. Code § 842