A: He could have taken care of this, but he chose not to. Allowing someone to do driving school to keep a ticket off their record is not a right, it is an agreement between your son and the State. He didn't follow through with his part of the agreement, so they no longer have to honor theirs. He asked the judge, who had the authority to accept the driving school certificate and dismiss the ticket, and the judge held him to his agreement to do driving school and show proof of completion by certain date, he failed to do so and now he has to pay the ticket.
A: You need to report it to the police immediately. You are not responsible for proving it, that is the police department's job. When you report it to the police, you may ask that your identify be kept confidential, and they may or may not do so. You could report it to the child abuse hotline, those calls are confidential. The investigation will not be kept confidential, the police will do what they need to to investigate the claims and they will determine how to go about it.
A: It sounds like you may not be a beneficiary under the will. If you were then you would have been contacted by the attorney or your sister to let you know that you are a beneficiary and what share you would receive. If he said that you need to a subpoena the will in order to see it, then you should do that.