Can’t speak directly for New York, but Grand Juries aren’t used in the case of normal criminal charges in my area. They are only convened when the DA needs to conduct an investigation to determine if charges are warranted.
Even in serious murder cases, the DA files charges and there is a preliminary hearing before a judge, although the preliminary hearing is frequently waived by the defendant and the case goes directly to trial or a plea agreement.
The article said that she was to go before a grand jury on Tuesday.