If convicted, at least one of the two people accused of killing a Bexar County jailer will face the death penalty. Lopes' body was found Oct. 12 behind a shopping center.
Capital murder carries a maximum sentence of life in prison or the death penalty.
The pair remained Friday in Bexar County Jail without bond. On Wednesday, a district court judge denied setting bond for Maxwell, saying he could be a flight risk. Besides Lopes' death, the pair also faces charges in Indiana related to the September slaying of a Federal Express mechanic there. Those charges include murder, arson, receiving stolen property and criminal confinement. Authorities linked the two deaths after finding a car they allege the couple drove from Indiana at Windsor Park Mall.