1) Because the manufacture might have something to do with the accident.

2)  Because of his reckless driving the police had a reason to stop him.

      

3)  if his mother was more responsible with her son, he wont be in that place. 

     -its the police job to stop anyone they suspect therefore the police arent guilty.

     -moreover, it was the mother son life and she didn't mean to take it on purpose however she must be more responsible.

     -Finally the manufacture must be more aware and they shouldn't let accents like this stop by so they ware charge with 330 thousand dollars.