Some years back Tom Brokaw got sued for saying that Richard Jewell was the Atlanta Olympics bomber just because the man had his mother living with him (he was her caretaker, it turned out). Brokaw had no business prosecuting Jewell in the media and Grace has no business doing the same. Just as Brokaw was held accountable for his misdeeds so should Grace.
Last I heard the "young woman" in question was considered the prime suspect in her son's death.
Good hunting, Nancy Grace. From the sound of it she saved the judicial system a lot of time and effort.