Driver of car ran into abortion rights protesters

A car driver went out of his way to run into abortion rights protesters. He was obviously using his car as a weapon, but the thugs let him go.

Iowa, where that took place, passed a law to shield drivers who attack protesters with their cars from lawsuits from those they hit. Nominally, that shield is limited to drivers "exercising due care," but it will serve as an excuse for antiabortionist juries to endorse injuring people.

However, that law doesn't affect criminal prosecution. The driver committed attempted murder. Is there any way to make the state prosecute this crime?

*The anti-abortion movement has an extensive history of violence* in the name of "protecting life". Violence to intimidate opposition is a standard part of right-wing extremism, and we see plenty of it now from US extremists (Republicans).