703.1  Aiding and abetting.
  All persons concerned in the commission of a public offense, whether they directly commit the act constituting the offense or aid and abet its commission, shall be charged, tried and punished as principals. The guilt of a person who aids and abets the commission of a crime must be determined upon the facts which show the part the person had in it, and does not depend upon the degree of another person’s guilt.
[C51, §2928; R60, §4668; C73, §4314; C97, §5299; C24, 27, 31, 35, 39, §12895; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, §688.1; C79, 81, §703.1]