A district attorney said that state troopers were justified in shooting a 19-year-old that brandished a pellet gun.

STROUDSBURG (AP) – Pennsylvania state troopers were justified when they shot and killed a distraught 19-year-old man who had brandished a pellet gun at them on an overpass in the Pocono Mountains, a district attorney said Tuesday as authorities released video of the fatal encounter.

Troopers went to the Route 33 overpass over Interstate 80 on Dec. 30 in response to a report of a suicidal man and found Christian Joseph Hall standing on the ledge, authorities said.

READ MORE: Teenage Girls Accused Of Setting House Fire In Ferndale That Sent Officer, Firefighter To Hospital

Troopers spent about 90 minutes trying to persuade Hall to give up and drop the weapon, saying “we are here to help you” and offering him food, drink, and a blanket. But he approached them while brandishing the pellet gun and they opened fire, said Michael Mancuso, first assistant district attorney in Monroe County.

“Frankly I’m astounded that they let him get so close with the threat he was presenting. It was clearly the last thing they wanted to do, was to open fire on him,” Mancuso said. “It was a classic ‘suicide by cop’ scenario.”

Hall himself had called 911 anonymously to report a possibly suicidal man on the bridge, Mancuso said.

Hall’s family has criticized the police for the fatal shooting, saying he was in the throes of a mental health crisis.

“He needed help. He was looking for help but instead of getting help, he was killed by those who were supposed to help him,” Fe Hall, his mother, said at a recent news conference.

The shooting prompted a march in Stroudsburg earlier this month, and the local chapter of the NAACP had called the death of Hall — who, according to his family’s attorney, was Chinese American — avoidable.

READ MORE: Cincinnati To Settle Suit In Death Of Student Kyle Plush Who Called 911

“We still believe there are solutions available that do not result in the loss of life in certain circumstances and are saddened by what we saw today,” Christa Caceres, president of the Monroe County NAACP, said in a statement Tuesday.

Civil rights attorney Ben Crump represents Hall’s family and has said a lawsuit is in the works. Crump and Devon Jacob, another family attorney, planned to hold a news conference Wednesday on the DA’s findings. Jacob declined to comment Tuesday.

The district attorney’s office played a previously unreleased dashcam video of the shooting that showed troopers assuring him he wasn’t in any trouble and offering assistance.

“I’m not sure what’s going on in your head, but this is not the end of the world. Just a little bump in the road,” a trooper said at one point, the video showed.

Eventually, Hall took several halting steps toward the troopers as they repeatedly yelled at him to “put it down.” Hall appeared to be holding the gun at his side when they fired several shots at him and missed, according to the video. He then raised his arms in the air, took another step, and was waving the gun when they fired again and hit him, the video showed.

The moment of the shooting itself was blurred out in the footage released. Mancuso said Hall was about 70 feet (21 meters) away from the troopers when he was struck. He was pronounced dead at a hospital.

The gun that Hall was holding turned out to be a pellet gun that resembled a Walther semi-automatic pistol, Mancuso said.

MORE NEWS: Penn Hills School District Provides Grief Counseling After Death Of Teacher James Schultz

(Copyright 2021 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)