Police arrested and charged a father and son early Thursday in connection with the murder of a pregnant teenager who was about to give birth, and her boyfriend, in San Antonio last month.

Christopher Preciado, 19, was charged with capital murder while his father, 53-year-old Ramon Preciado, was charged with abuse of a corpse for allegedly helping to move the bodies of Savanah Soto, 18, and Matthew Guerra, 22, who were found shot dead in a car.

A conviction for capital murder is punishable by the death penalty or life imprisonment.

San Antonio Police Department confirmed the charges in a statement and said more charges are pending, possibly relating to the death of the unborn child.