Pieced together through 911 dispatches and other sources, here's how everyday heroes responded to a hostage situation and killing of a police officer.

A funeral service will be held later this week for a Pennsylvania police officer who was killed last weekend while responding ...

An officer was killed and multiple people were injured in a shooting reported at UPMC Memorial Hospital in York County, ...

Staff, patients, and visitors to UPMC Memorial Hospital in York, PA are recovering from an active shooter event Saturday ...

The gunman who held intensive care unit staff hostage at UPMC Memorial Hospital in Pennsylvania before killing a police ...

Violence against healthcare workers is on the rise as seen by an attack at a Pennsylvania hospital. A gunman took hostages ...

An autopsy has been scheduled for the man who entered UPMC Memorial Hospital armed with a semiautomatic handgun and zip ties ...

One officer was killed and at least five others were were shot in a hostage situation at a hospital in York County, ...

The chief of the Northern York Regional Police Department said one of the officers injured in Saturday's mass shooting at ...

Injured, 2 Dead in Pennsylvania Hospital Shooting, UPMC Memorial Hospital, Diogenes Archangel-Ortiz, Andrew Duarte ...

A shooting at UPMC Memorial Hospital Feb. 22 in York, Pa., left the suspected gunman and a police officer dead and injured ...