I have fairly mixed emotions about this entire situation, as my son was texting me in the middle of the situation to see if I knew what was going on since he saw it going down out the window of his classroom.
From the coverage in the Rag, assuming they are citing the Ames PD pursuit policy accurately, the pursuit should have ended because they knew the suspect's identity and could have apprehended him at a later time. Not seeing the entire policy and going by what was in the Rag. I would guess there may be some exceptions but not sure if they would apply. The article appears to indicate that the dispatcher suggested twice that pursuit should end in the "college area." When he said they knew who the driver was and could back off, he got no response.
I have no idea what was a greater danger to students. My guess would be had the pursuit ended at Lincoln Way and Beach, at least the truck would never had wound up on the grassy area of central campus. It may have sped through campus streets in a reckless manner and endangered students walking to class with their headphones and their attitude that eh, the car will stop for me. Of course, that also happened because of the pursuit.
Once the officer decided to pursue and had the car surrounded, not really sure what posed a greater threat to students in the area, the chances that a bullet ricochets off the truck and hits them, or the possibility that somehow the truck could escape and run someone down. By surrounding the truck, I am sure the officers were in some danger or thought so since he kept revving the engines. The students at this point probably had less danger from the truck than the bullets because they were clearing out of the area, but the officers were in danger from the truck or thought so and the young man was not following their directives.
In the Rag article, the father seems angry and devastated by grief. People should be sensitive to that. He is agonizing over his own decisions and the loss of his child. The officer probably is too. I am certain the entire thing will be thoroughly reviewed. My compassion and prayers go out to everyone involved.