SPRINGFIELD -- Adam Lee Hall hung his head after hearing the jury's verdict of guilty on charges of first-degree murder.

A communal sigh of relief went up from the family of one of the victims and the police investigators who worked the case.

Hall, a Hells Angels gang member, was convicted in Hampden Superior Court on Friday, of three counts each of murder, kidnapping and witness intimidation for orchestrating the gruesome killings of David Glasser, Edward Frampton and Robert Chadwell in August 2011.

"Obviously we are quite gratified by the verdicts. This is a gratifying end to the first of three cases for the Chadwell family and the friends of David Glasser and Edward Frampton," said Berkshire District Attorney David F. Capeless on Friday afternoon. "It's important for the public to know that this was not an investigation into whether Adam Hall had done this. This was determining the truth and justice of what had happened."

On Friday, after 16 hours of deliberations over four days, the jury of nine women and three men sent Judge C. Jeffrey Kinder a note telling him that they were deadlocked on the three murder charges, and had been since Tuesday afternoon.

The judge brought them in, gave them a standard instruction about continuing to deliberate and an hour later the jury came back with guilty verdicts on 15 of the 19 charges against Hall, including three counts each of first-degree murder, kidnapping and witness intimidation.

Carol Chadwell Smith, the sister of Robert Chadwell, said she "never experienced any doubt" about how the case would turn out.

"I had a lot of confidence in the DAs Office and what they were doing. They did a good job," she said. "They've been on this case since day one, with lack of sleep, I'm sure, and I had no doubt they would turn this into a guilty verdict."

Hall, 36, will be sentenced Monday and although at minimum he faces life without parole on the murder charges, the DA may be asking for some of the convictions to be served consecutively. Smith asked the judge on Friday to sentence Hall to the maximum.

Hall, with David Chalue, 46, of North Adams, and Caius Veiovis, 32, of Pittsfield, allegedly kidnapped, tortured and then shot David Glasser, Edward Frampton and Robert Chadwell in August 2011 and buried the bodies in Becket, according to testimony.

Chalue and Veiovis remain in jail without bail; their trials are to begin in the coming months. Smith felt Hall's trial was the most important of the three because Hall, she said, is the person "who killed my brother and his two friends."

The case was based entirely on circumstantial evidence, but featured testimony from David Casey, himself charged as an accessory in the case. He told the jury Hall described how he and his cohorts shot, stabbed and "gutted" the victims and then "chopped up" their bodies.

Glasser begged for his life as Hall told him "I warned you what would happen if you testified against me," Casey said.

Casey, 65, of Canaan, N.Y., said Hall had scared him into helping dispose of the victims' remains using his excavator. Casey continues to be held at the Berkshire County Jail & House of Correction on $1 million bail.

Hall's attorney, Alan J. Black, argued that no DNA or other forensic evidence linked his client to any of the crimes, no murder weapons were found, and no one knows where the killings took place.

During the trial, Capeless linked a string of confrontations - some violent -- between Hall and Glasser between 2009 and 2011. Ultimately, Hall killed Glasser to prevent the man from testifying against him, Capeless said.

The incidents started when Hall beat Glasser with a baseball bat in July 2009. From there, Capeless said Hall tried to discredit Glasser as a witness by framing him for a fake armed robbery.

Those incidents prompted Hall to kill Glasser so he could not testify against him, according to Capeless.

In August 2011, weeks before he was to testify against Hall, Glasser and his roommate, Frampton, and their friend Chadwell, all of Pittsfield, disappeared from Glasser's Pittsfield apartment, where they had hunkered down to wait out Tropical Storm Irene. Their dismembered bodies were found buried in a trench in Becket nearly two weeks later.

Frampton and Chadwell were killed to eliminate them as witnesses, prosecutors say. Capeless said they had undertaken "a thorough investigation" in the case, which they will also "bring to bear" on the next two trials.

"I want to thank all involved in those investigations," he said. "They put an incredible amount of time and effort into it."

The DA also thanked the jury in the Hall trial.

"They were very thoughtful and attentive throughout the trial," Capeless said. "And they obviously gave very serious consideration to all the charges."

The trial started Jan. 13. Jurors began deliberations on Monday. Proceedings were moved to Hampden Superior Court in Springfield because of pretrial publicity in the Berkshires. Capeless presented the prosecution's case with the assistance of First Assistant Berkshire District Attorney Paul J. Caccaviello and ADA Gregory Barry.

Black, who didn't have a comment, was assisted by attorney Jeanne A. Liddy.

An appeal will be filed in the case.

The verdicts

Adam Lee Hall was found guilty of:

* three counts of murder

* four counts of kidnapping

* four counts of witness intimidation

* armed robbery

* assault and battery with a dangerous weapon

* possession of a firearm

* conspiracy

Hall was found not guilty of:

* two counts of witness intimidation

* extortion

* kidnapping