LANCASTER - Police in central Pennsylvania say the infant shot and killed in a suburban Lancaster apartment on Christmas Eve is Kestyn Davis, and her parents are cooperating with the investigation.

East Lampeter Township Police said Thursday the girl's parents are Alyssa and G. Scott Davis.

An autopsy determined on Thursday that Kestyn died of a single gunshot wound to the abdomen.

Authorities say an adult relative fired the fatal shot, but they aren't identifying the shooter. She was killed by a handgun.

Police say they expect the investigation to be completed in a few days.