do miranda rights need to be read when someone's arrested?

my son was arrested for having vitamins that looked like an illegal drug on him. he was in a parking lot with his friends with the car turned off. the cook county sheriff came over and ordered them out of car, there was no reason except he and his friends are in there late teens early twenties. his rights were never read when arrested and there was no ticket issued for actual arrest. the officer also used excessive force when arresting my son and threw him onto the hood of car when cuffing him even though my son didn't resist. my son also had given the officere his insurance card which the officere took and still wrote a ticket for no insurance. the officer kept my son's insurance card and towed car. my son was also given a ticket for disobeying a stop sign, again he was parked in a parking lot with the vehicle turned off and there was no verbal mention of any traffic violation at the time he was approached in his vehicle.