Your recollection is faulty.
The DA at the time of the murder and for some years after was a man, Alex Hunter. He is the prosecutor who called, and then ignored, the findings of his own grand jury.
Mary Lacy investigated the case starting in 2001 and later. She is the woman who wrote a preposterous apology to the Ramsey family, despite being told that the DNA evidence found on the child's panties was inconclusive and not exculpatory. A number of subsequent experts have come forward over the years, reiterating that the DNA found by Lacy's team did not clear the Ramsey family.
Thank you for the correction.