A father and son face charges in the deaths of Savanah Soto and her boyfriend Matthew Guerra late last month. San Antonio police arrested 19-year-old Christopher Preciado on Wednesday for capital murder, and 53-year-old Ramon Preciado for abuse of a corpse. Police say Soto and Guerra were shot and killed on December 21st in a botched drug deal. Their bodies were found in Guerra's car the day after Christmas. Police say a cell phone found at the scene contained information that led detectives to the suspects.