719.3  Preventing apprehension, obstructing prosecution, or obstructing defense.
  A person who, with intent to prevent the apprehension or obstruct the prosecution or defense of any person, knowingly does any of the following acts, commits an aggravated misdemeanor:
  1.  Destroys, alters, conceals or disguises physical evidence which would be admissible in the trial of another for a public offense, or makes available false evidence or furnishes false information with the intent that it be used in the trial of that case.
  2.  Induces a witness having knowledge material to the subject at issue to leave the state or hide, or to fail to appear when subpoenaed.
[C51, §2654; R60, §4281; C73, §3946; C97, §4882; C24, 27, 31, 35, 39, §13170; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, §723.1; C79, 81, §719.3]