A world-class Baltimore, Md., hospital experienced its own trauma Thursday when a patient’s relative opened fired on a doctor and then barricaded himself in a room.
Heavily-armed officers swarmed Johns Hopkins Hospital where a gunman was holed up inside.
"It's scary and totally unexpected," said one witness.
Parts of the hospital were in lockdown for a couple hours.
Police say 50-year-old Paul Warren Pardus became distraught after receiving bad news about his mother, who was a patient at the hospital. He shot and wounded the doctor, identified by colleagues as orthopedic surgeon David Cohen.
"The suspects' mother was paralyzed after supposedly an operation, I think,” said Milton Thomas. “And because of that he retaliated."
The violence didn't stop there. Pardus barricaded himself in a room, shot and killed his mother, then took his own life.
It was a shocking incident for the hospital, regarded as one of the best in the world.
"I don't understand how a world renowned hospital like this don't have metal detectors or something," said a witness.
Dr Cohen was rushed into surgery for abdominal injuries, but he is expected to be okay.
Johns Hopkins is Baltimore’s biggest private employer, with more than 1,700 full-time physicians.