Learn from this story, and just don't talk to them.
The dangerous part of this story is that she reports her grand jury experience as a success, suggesting that you _can- talk to the state and 'win'. Maybe it was as successful as she thinks, maybe it wasn't. And we can't say that you can _never_ be succesful talking to the prosecutors; never say never. But what we can say is that they are _experts_ at 'winning' in those confrontations, they've trained for it and practice it every day, no matter how smart you are you're _probably_ going to end up hurting yourselves or your friends and loved ones by talking to the prosecutors.
Stick with the conclusion from the first part, never, ever, talk to the prosecutors.