Police have released an old booking photo for a man who shot and killed a police officer and injured several others in a hostage-taking incident at a south-central Pa. hospital Saturday morning.

Lester Mendoza, who specializes in pulmonary critical care, was present when the perpetrator was informed about his loved one's death.

Diogenes Archangel-Ortiz on Saturday killed a police officer during a hostage situation at UPMC Memorial Hospital in York ...

A physician’s assistant at UPMC Memorial Hospital claims he delivered devastating news to Diogenes Archangel-Ortiz in the ...

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

There's a spotlight on the safety of U.S. healthcare workers and the challenge of protecting them. It comes on the heels of a ...

Lester Mendoza, a physician assistant at UPMC Memorial Hospital in York, said he helped tell the shooter a loved one had ...

Days before a hostage situation turned deadly, a physician assistant says he spoke to the man who killed a police officer and ...