Alex Murdaugh, 54, is accused of murdering his wife and son at their 1,700-acre hunting lodge in Islandton, South Carolina, on June 7, 2021.
His wife, Maggie, 52, was shot several times with a rifle and son Paul, 22, was shot twice with a shotgun near the dog kennels on the property.
He faces 30 years to life in prison if convicted.
Murdaugh also faces about 100 charges related to other crimes, including money laundering, stealing millions from clients and the family law firm, tax evasion and trying to arrange for a hitman to shoot him in the head so his surviving son could collect a $10 million life insurance policy.
He was being held in jail without bail on those counts before he was charged with murder.
His family had previously dominated the legal system in tiny neighboring Hampton County for generations, both as prosecutors and private attorneys known for winning clients life-changing settlements in accidents and negligence cases.