Chadwell, 39, of Seymour Street, was arrested on a warrant Friday night during a traffic stop on Wahconah Street, according to court files obtained by The Eagle.
His sister, Yulanda J. Chadwell, 37, also was arrested when she went to the police station asking about her brother's arrest. She is accused of lying to police about her brother's whereabouts the night of the shooting.
Henry was found in the street with what appeared to be a gunshot wound to the chest about 11:30 p.m. July 4 during a large block party. He was pronounced dead at the scene.
A witness told police they saw JC Chadwell and Henry facing each other; they said they heard a gunshot and saw Henry grab his stomach and drop to the ground.
The witness told police they saw smoke near JC Chadwell, who then ran from the scene into nearby Durant Park.
That same witness also said they saw Henry get up from the ground and start to run before collapsing in the street.
The shooting stemmed from an argument April 27, 2012, when two got into an argument over money Henry owed Chadwell, according to the court files.
Henry allegedly grabbed a machete and swung it at Chadwell, cutting his ear. Chadwell responded by breaking a window in Henry's car as he drove away. Both men were treated for injuries sustained during the fight; neither were cooperative with investigators.
Chadwell was interviewed on July 27, 2017. He was told police were interviewing everyone at the party. Chadwell asked if he was going to be arrested, despite not being told he was a suspect.
He admitted to being at the party, but denied shooting Henry, police said.
He told police he left the party prior to the shooting and went to Hudson, N.Y., with his sister and others and returned on July 5 or 6.
During that interview, Chadwell said he had no issues with Henry, but told police he had heard from others Henry was paid to kill him. He told police he was the victim of an assault on John Street, in which Henry may have been involved, but he wasn't sure it was him who had done it.
Chadwell was the only suspect identified as the shooter by multiple witnesses during the course of the investigation, according to police.
On July 30, the couple Chadwell said he visited in Hudson told police they spent July 4 in Pittsfield with Yulanda Chadwell, and left the following afternoon.
On Sept. 4, Yulanda Chadwell was interviewed by police about the block party. Without prompting, she allegedly told police, "I'm not going to say anything about my brother."
She told police she and her boyfriend drove to Hudson after leaving the party and her brother followed her in a separate car.
Her boyfriend contradicted that account and told police he had stayed in Pittsfield the night of July 4.
Police also believe JC Chadwell was given a ride from Pittsfield to Chicopee the night of the shooting.
JC Chadwell pleaded not guilty in Central Berkshire District Court on Monday to one count of murder.
His sister pleaded not guilty to one count of misleading police for allegedly providing investigators with a false alibi for her brother. Her bail was set at $2,000.
Assistant Berkshire District Attorney Rachael Eramo and JC Chadwell's attorney, Jennifer Cox, agreed to have Chadwell held without the right to bail on the murder charge.
Eramo asked Judge Mark J. Pasquariello to set Yulanda Chadwell's bail at $25,000, based on what she called a history of violent behavior, including past convictions on assault and battery charges; the most recent being in 2010.
Her attorney, Marc C. Vincelette, called the state's bail request "unconstitutionally high," and asked for a $1,000 bail instead.
Vincelette noted Chadwell had been out of legal trouble for about eight years and supports her family in Pittsfield, mitigating her risk of flight.
"She is the definition of a hard-working single mother," Vincelette said.
Vincelette noted the case against his client hinges on assuming the people who contradicted Yulanda Chadwell's version of events are the ones telling the truth.
JC Chadwell is due back in court on March 14 for a pretrial hearing. A pretrial hearing for Yulanda Chadwell was set for March 13.
Bob Dunn can be reached at firstname.lastname@example.org, at @BobDunn413 on Twitter and 413-496-6249.