The provisions of the Iowa code of criminal procedure shall be liberally construed to give effect to the general purposes thereof, which shall be to provide for:
1. Simplicity in criminal procedure.
2. Fairness in administration of the criminal laws.
3. Elimination of unjustifiable delay in pretrial, trial, and post-trial proceedings.
4. Just determination of every criminal proceeding by a fair and impartial trial and review.
5. The effective apprehension and trial of persons suspected of committing public offenses without violation of fundamental human rights.