How can a person defend themselves from charges if they are not informed specifically what they are being charged with? Theft is vague, and not legitimate; neither is burglary.
The grand jury knows what she is charged with. Why should she not know?
I agree with everything you say, and it will matter if she is held in jail for a significant time and still doesn’t know.
But it’s too soon to play that victim card. The cops are not required to tell you anything or press charges for a certain period of time. I don’t know for sure what it is, but I believe it’s at least 24 hours. I think the reason for this is to give cops a chance to process you without worrying about being sued.
So at some point in time it is standard to either press charges or let the person go. Until that time comes, it is unreasonable to suggest they are being intentionally secretive.