Editor's note: This story was modified on Jan. 29, 2014, to correct the name of Joseph "Whitey" Knorr, who was incorrectly referred to as James "Whitey" Knorr.

SPRINGFIELD -- A witness on Tuesday said he tried to repair a semi-automatic pistol for Adam Lee Hall before the alleged murders of three men in August 2011.

Brian Johnson testified in Hampden Superior Court that sometime in the summer of 2011, Hall gave him a Kel-Tec PLR-16 with a broken trigger and asked him to fix it.

The PLR-16 is a semi-automatic pistol that fires .223 rounds.

Johnson, who lives in Connecticut, is a welder-fabricator who has known Hall for about 10 to 15 years and has repaired motorcycle parts for him, he said.

According to Johnson, he had the gun for about three months before he ordered a new trigger for it but when he got the part he couldn't figure out how to disassemble the gun. He said he called Hall and told him he couldn't fix it.

"Get it back to me as soon as you can," Hall allegedly told him.

The witness said he met Hall at the Hells Angels clubhouse in Lee and returned the gun and the new trigger.

Johnson was given immunity from prosecution for his testimony.

Under cross-examination by Hall's attorney, Alan J. Black, Johnson said it could have been in May that Hall approached him with the request.

He said the gun doesn't fire .45 caliber shells.

Police recovered .45 caliber projectiles from the victims' remains. They did not recover .223 projectiles, according to prior testimony.

Tuesday also saw testimony from Massachusetts State Police Capt. Richard Smith, who headed up the murder investigation.

According to Smith, on Sept. 4, 2011, before Hall, David Chalue and Caius Veiovis were charged with the crimes, they were seen driving up to Pittsfield State Forest and then quickly turning around before reaching a police cordon. Officers followed them to a gas station on Wahconah Street, where they were questioned but not arrested. Smith said he asked Hall where he had been on the night of Tropical Storm Irene (the night Glasser and his friends went missing).

Hall said he was with lots of people that night and if Smith wanted to know who he was with he would have to call his lawyer, Smith testified.

Hall told Smith he didn't want to say who his friends were because he didn't want police to hassle them like they had been for the last couple of days, Smith testified.

Smith said Hall continued to speak with him.

"I know who's talking to police because they call me and tell me," Hall allegedly told Smith.

Smith said Hall told him that everyone knew what this was about.

Hall allegedly told Smith it wasn't his job to chase down [a racial epithet] who does [expletive] in the city.

"It's obvious to me what's going on and what happened ...You know who I am and what we do," Hall allegedly told Smith.

Smith said after talking with Hall he had Veiovis' Jeep seized, along with Hall's boots and socks and the men's cellphones.

Under cross examination, Smith said no blood or DNA from the victims was found in the Jeep and no guns were found in the vehicle. Binoculars and night vision goggles were found inside, he said.

Black also questioned Smith about a report by Lisa Archambault, Glasser and Frampton's neighbor, made to police about hearing a loud argument at Glasser and Frampton's home involving Joseph "Whitey" Knorr and two other men on the afternoon of the same day the victims disappeared.

Smith said Knorr and his two friends were questioned by police and their alibis were checked out. Knorr even provided a DNA sample and cooperated with police. he said.

On Monday, Karen Sutton testified Hall told her that Knorr and two "black guys" were responsible for the men's disappearance. Glasser owed them money for crack, she was told.

Hall said they had borrowed a car and when it was returned there was blood on the back seat, she testified.

Archambault previously testified that she heard an argument between Frampton and two men. She said she "knew" it was about money and assumed "it was about crack."

Testimony continues on Wednesday.