Pennsylvania, police and shooting

A gunman who held medical staff hostage before killing a police officer and wounding five others at a hospital in ...
By Simon J. Levien and Lauren McCarthy A Pennsylvania police officer was killed while responding to a shooting on Saturday at a hospital in York County, Pa., in which the gunman, who held ...
An active shooter incident at a Pennsylvania hospital is under investigation. NBC News affiliate WGAL reports police responded to the incident at UPMC Memorial Hospital in York County on Saturday ...