The thing that sucks is that Pina was a Republican. Pina disappeared when the Foreman of the Grand Jury tried to contact him. The Idiot Foreman didn't realize he could have called the Grand Jury on his own authority and demanded the State Police get Pina, and then demanded that Pina investigate.
A Grand Jury can investigate any damned thing they please during their term and there isn't a (Real Bad Swear Word) a (Real Bad Swear Word) Judge can do but comply with an order to produce a witness.
No one was going to indict Ted Kennedy. There is an excellent book on the subject. I think it's called Senatorial Privilege.