Any peace officer making a legal arrest may orally summon as many persons as the officer reasonably finds necessary to aid the officer in making the arrest.
Iowa Code § 804.17
Summoning aid
[R60, §4556; C73, §4208; C97, §5203; C24, 27, 31, 35, 39, §13475; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, §755.11; C79, 81, §804.17]
Official source: Iowa Legislature. Reproduced from public-domain Iowa statutes; confirm against the official source for the current text. Not legal advice.