She was the first woman to be put to death by the federal government since 1953 and had been the only woman on federal death row.
At least 14 of the roughly 50 men held in the secure facility at the federal penitentiary in Terre Haute, Ind., have tested positive. Staff members involved in executions have also gotten sick.
Despite a high-profile clemency campaign by allies of President Trump, the administration executed Brandon Bernard by lethal injection for his role in the 1999 crime.
Lisa Montgomery, the only woman on federal death row, was convicted of killing a pregnant woman and attempting to pass the baby off as her own.