The man, who has not been identified, is expected to live.
“They were approached by a man who had possession of a weapon,” Sgt. Wade Betters said at the scene. “There was a brief confrontation and as a result one of the officers on scene shot this individual.”
Two eyewitnesses reported that the man was threatening the officers with the knife.
“They told him multiple times to drop the knife,” said a man working on a nearby roof who declined to speak on camera. “He just kept running.”
“Easily over 20 times, maybe more, maybe upwards of 30 times they ordered him to drop the knife,” said a Grove Street resident who declined to speak on camera. “Drop the knife, they were verbalizing that the weapon was a knife.”
Both eyewitnesses said the man was acting aggressively.
“He was lunging at the three officers,” the resident said.
“The cop tried to back away but by the time he kept backing up he was already against his cruiser and the tree there, so he had nowhere else to go, so he was forced to fire,” said the roofer.
The man was taken to a local hospital for treatment.
“We're willing and ready to talk to anybody who may have seen or witnessed what transpired on this street a short while ago,” Betters said.
The roofer said Officer Hall was visibly upset.
“After the cop did it, he didn't want to do it,” he said. “He was shaking but the guy didn't give him no choice. He kept running at him.
“It was nuts.”
The Grove Street resident, who worked in law enforcement for 26 years, said the man yelled several times at the officers – who all had their weapons drawn – to “go ahead” and shot him.
“They were tremendously restrained,” he said. “Very, very professional. It's obvious they certainly didn't want to do what ended up happening. They followed everything to the T.”
Officer Hall has been with the police department for about a year, Police Chief Mark Hathaway said from the scene later in the day.
The last fatal police-involved shooting in Bangor happened in 2015.
The Maine attorney general's office investigates all officer-involved shootings, and since 1990 has deemed every police shooting legally justified.