Melinda Brady now faces a first-degree robbery charge, which carries up to 25 years in prison if she's convicted. She had previously been charged with third-degree robbery.
The judge ordered her held without bail on Tuesday.
She'd been jailed on $750,000 bail since she and her husband were arrested last month. Brady said in a police statement that she and her husband, David Laffer, plotted the robbery, but she did not know the plan involved killing.
Laffer faces first-degree murder charges.