Doctor Who Stormed NYC Hospital With Assault Rifle, Killing 1, Wanted Revenge

Dr. Henry Bello reportedly vowed to kill after he was forced to resign from Bronx Lebanon Hospital.

The New York City doctor who stormed a hospital on Friday armed with an assault rifle was a former employee out for revenge, cops have revealed.

Dr. Henry Bello has been identified as the physician who walked into Bronx Lebanon Hospital on Friday, AR-15-style rifle in hand, then opened fire on former colleagues and others in his department before taking his own life.

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Six people were wounded in the attack and one doctor was killed.

In the aftermath of the chaos, as critically injured victims fought for the life, a picture of who Bello was is being pieced together from former co-workers who recall his uneven temperament.

"There are many, many details that we're still putting together," said Mayor Bill de Blasio said at a Friday press conference. "This was a horrible situation unfolding in a place that people associated with care and comfort, a situation that came out of nowhere."

In fact, it had been two years since Bello was let go and authorities aren't yet sure why he only snapped now and whether or not he was on a mission to kill someone specific when he entered the 16th floor.

What authorities do know is that Bello had a bizarre criminal history and, according to some who knew him, a difficult personality.

"We fired him because he was kind of crazy," Dr. Maureen Kwankam told the Daily News. "He promised to come back and kill us then."

More specifically, Bello was reportedly forced out amid sexual harassment allegations.

According to the AP, Bello also had a history of other, unrelated, aggressive behavior. IN 2004, he pleaded guilty to unlawful imprisonment after a 23-year-old woman told police Bello picked up and carried her off, saying, "You're coming with me."

He was arrested again in 2009 on a charge of unlawful surveillance after two different women told police he tried to look up their skirts with a mirror.

Bello's unhinged behavior reached a crescendo Friday when, the dead and injured in his wake, cops say he may have doused himself in accelerant and attempted to set himself on fire before sprinklers put out the flames.

Bello then subsequenty shot himself and collapsed in a hospital hallway, where he died with the rifle at his side, officials said.

Read: 6 Dead, Including Gunman, After Disgruntled Employee Opens Fire in Office: Cops

Bello’s body was near that of a female victim, a fellow doctor, whom he had killed, according to NYPD Commissioner James O’Neill.

Officials have not released the identity of the victims.

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