Iowa Code § 804.11 : CRIMINAL LAW AND PROCEDURE — CRIMINAL PROCEDURE — COMMENCEMENT OF ACTIONS - ARREST - DISPOSITIONS OF PRISONERS — Arrest of material witness TEXT PDF 1. When a law enforcement officer has probable cause to believe that a person is a necessary and material witness to a felony and that such person might be unavailable for service of a subpoena, the officer may arrest such person as a material witness with or without an arrest warrant. 2. At the time of the arrest, the law enforcement officer shall inform the person of: a. The officer's identity as a law enforcement officer. b. The reason for the arrest which is that the person is believed to be a material witness to an identified felony and that the person might be unavailable for service of a subpoena. Iowa Code § 804.11 Amended by 2013 Iowa HF+556,s 239, eff. 7/1/2013. C51, §2876 - 2879; R60, §4601 - 4604; C73, §4248 - 4251; C97, §5232 - 5235; C24, 27, 31, 35, 39, §13547 - 13550; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, § 761.21 - 761.24; C79, 81, § 804.11 . Referred to in § 804.23 See § 815.6