Your son is very young and needs help. If he was the passenger in the car he may have a very good defense at trial. Also, it is very important to know why the car was stopped. His Constitutional rights may have been violated. Call a lawyer that will fight hard for your son
No! A Grand Jury is secret proceeding where the government officially charges someone with a crime. Double jeopardy only attaches after the individual was indicted by the GJ and their jury or bench trial starts. Do not confuse Grand Jury with a Jury of 12 people- these are two totally different things.
DO NOT EVER TALK TO ANY INVESTIGATOR WITHOUT A LAWYER. The only purpose for the interview/interrogation is to get you to make incriminating statements. You must hire a lawyer that is experienced in federal law and that will fight for you!!
Without more facts it is hard to say. But, did he find anything illegal in the car? If he didn't then for your criminal case it really does not matter if the search was illegal, because no evidence were found.
It sounds like you are looking for an experienced trial attorney that won't be the prosecutor's tool. Any lawyer that will give you predictions about the outcome of the case cannot be trusted. We are not future tellers, but a good lawyer will know how to fight the case based on a careful review of the evidence. The Cook County State's Attorney just recently started to charge people with Conspiracy. You need someone that knows conspiracy laws. You need someone that has been fighting drug cases...
If the police or a witness saw someone running into the garage immediately after the shooting, or the police were chasing the shooter, then they may be allowed to go in without a warrant or consent. BUT, there are so many exception to the rules that only after reviewing all the facts and reports a good lawyer would be able to give you an answer. Contact a lawyer
Fraud in the amount you mentioned would most likely be charged in Federal court. That being said, the state can also charge you with Fraud. You should talk to a lawyer and provide the lawyer with more details in order to get a better answer
The prosecutor can call any witness he wants to testify, but that doesn't mean the judge or jury will believe the witness. A good defense attorney will know how to impeach the witness and discredit him.