Iowa Code § 904.507
An inmate of a state correctional institution who escapes from it may be arrested and returned to the institution, by an officer or employee of a state correctional institution without any other authority than this chapter, and by any peace officer or other person on the request in writing of the superintendent or the state director.
[SS15, §2713-n15; C24, 27, 31, 35, 39, §3738; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §245.15] 83 Acts, ch 96, §88, 159; 83 Acts, ch 101, §52; 84 Acts, ch 1184, §12 C85, §217A.38 85 Acts, ch 21, §54 CS85, §246.507 C93, §904.507