Iowa Code Title XVI. Criminal Law and Procedure [Chs. 687-916] § 719.5. Permitting prisoner to escape

1. If the prisoner is in custody by reason of a conviction or charge of a class “A” felony, the defendant commits a class “C” felony.

2. If the prisoner is in custody by reason of a conviction or charge of any public offense other than a class “A” felony, the defendant commits a class “D” felony.