LANCASTER – A Lancaster County girl has been charged with criminal homicide in the stabbing death of her older sister in their Manheim Township home. Police responded shortly after 1 a.m. Monday to the 1500 block of Clayton Road after the girl called 911 claiming she killed her sister. Arriving officers were met by 14-year-old Claire Miller, who directed them to a bedroom where they found 19-year-old Helen Miller with a stab wound. EMS personnel attempted lifesaving measures, but they were unsuccessful. Investigators say the incident happened during the overnight hours when the girls’ parents were asleep. Prosecutors say the teen will be charged with criminal homicide as an adult. They said a motive is still being sought as well as the circumstances of the death.