The panel also indicted Kathleen Dorsett and her 64-year-old father, Thomas, for the August murder of her former husband, Stephen Moore.
The Asbury Park Press reports prosecutors said the former third-grade teacher wanted her ex-mother-in-law dead because the woman had been awarded temporary custody of her granddaughter after the homicide.
Authorities claim Kathleen Dorsett asked fellow inmates for the name of a hitman and told her mother to give him a $1,000 down payment.
The hitman turned out to be an undercover officer.