Ex-doctor sought to extract revenge on former colleagues

In an instant, Dr. Henry Bello triggered a Code Silver at Bronx Lebanon Hospital, sending his one-time colleagues diving for cover on the hospital's two top floors while he repeatedly pulled his trigger, killing a doctor who had the misfortune of covering someone else's shift as a favor and injuring six others, including a patient.

[...] I was told it was because I always kept to myself.

A law enforcement official told The Associated Press that Bello arrived at the hospital with the assault rifle hidden under his lab coat and asked for a specific doctor whom he blamed for his having to resign, but the physician wasn't there at the time.

The six others who were injured — a patient, two medical students and three physicians — largely suffered gunshot wounds to the head, chest and abdomen.

"Many of our staff risked their own lives to save patients," Schneer told reporters at the hospital where the 16th and 17th floors remained closed, and staffers were still recovering from the rampage that sent people diving for cover and huddling in patients' rooms while the gunman was on the loose.

According to New York State Education Department records, Bello graduated from Ross University and had a permit to practice as an international medical graduate that was issued on July 1, 2014, and expired last year on the same day.