Iowa Code § 691.4

The county attorney shall give the accused person, or the accused person’s attorney, after an indictment or county attorney’s information has been returned, a copy of each report of the findings of the criminalistics laboratory conducted in the investigation of the indictable criminal charge against the accused person at the time of arraignment, or if such report is received after arraignment, upon receipt, whether or not such findings are to be used in evidence against the accused person. If such report is not given to the accused or the accused person’s attorney at least four days prior to trial, such fact shall be grounds for a continuance.