 A father and son in Texas have been charged in the killings of an 18-year-old pregnant woman who disappeared before Christmas and her boyfriend, who San Antonio police say were fatally shot before their bodies were moved and later found in a car. The arrests announced by San Antonio police come more than a week after the bodies of Savannah Nicole Soto, 18, and Matthew Guerra, 22, were found in the parking lot of an apartment complex, San Antonio Police, Washington, Mascoso said their deaths appeared. To be the result of a drug deal but did not offer further details. Investigators now believe the couple were killed on December 21, Mascoso said. Police said Christopher Preciado, 19, is charged with capital murder in his father, Ramon Preciado, 53, was charged with abuse of corpse for allegedly helping his son move the couple's bodies. So the two individuals we just walked out today, again, is a father and son. The first individual is a father, the second individual is a son. They're going to be charged, the son's going to be charged this evening with capital murder and the father's going to be charged with abuse of a corpse. So we do expect more charges to be pending. One of the key pieces of evidence that we did collect at the scene was Savannah's cell phone and so that was handed over to our technology team who was able to download some information on there with the assistance of the US Secret Service. We were able to get enough information and so that information was given to our detectives today. With that information, the detectives were able to find a possible location of where the suspect vehicle that was released on that surveillance camera, the surveillance video, a possible location where that suspect vehicle might be. The first individual, the father, answered the door. He knew why the police were there, was cooperated fully with the investigation. We're right here at the headquarters and our detectives were able to start interviewing both the son and the father. Again, Christopher, we believe committed the murders of Matthew and Savannah and then Ramon helped kind of dip the button. It appears to be a narcotics-related deal.