Police say Caleb Barnes stabbed Cheryl Silvonek , 54 , to death on Sunday . Killing happened in car in front of Upper ##dale , Pennsylvania , home . Daughter and Barnes allegedly attempted to clean up car and bury the body . Barnes was visiting while on weekend vacation from Fort Meade in Maryland . He is charged with criminal homicide , possession of a corpse and sexual assault . Barnes faces charges for corpse abuse and hindering apprehension .
Police say Caleb Barnes stabbed Cheryl Silvonek , 54 , to death on Sunday . Killing happened in car in front of Upper Macungie , Pennsylvania , home . Daughter and Barnes allegedly tried to clean up car and buried the body . Barnes was visiting while on weekend leave from Fort Meade in Maryland . He is charged with criminal homicide , abuse of a corpse and sexual assault . Girl faces charges including corpse abuse and hindering apprehension .