Keville, 35, and Banks, 28, were a former boyfriend and girlfriend who had once lived together in an apartment at 625 Main St. in Gorham, according to Assistant Attorney General Nicholas Chong Yen. The couple had a falling out and Keville moved to his own apartment in Berlin.

On the evening of April 26, 2022, Keville became jealous and outraged to find that Banks, a mother of two young children, was at Fagin’s Pub in Berlin, having an evening without the kids and being convivial with others, Chong Yen said.

At the pub, Banks met LaBelle, 42, for the first time, said Chong Yen. He offered to buy her a beer after Keville drank hers. That gesture prompted Keville to jump up and confront LaBelle.

After an hour of confrontation, staff at Fagin’s threw Keville out of the bar and called the police. Banks didn’t make a complaint against Keville because she “wanted to move on” with the rest of her evening, which included inviting LaBelle to her apartment, said Chong Yen.

For reasons that Chong Yen did not make clear, but which defense attorney Allison Schwartz later did, a distressed Keville later went to the Gorham Police Department where he convinced officers to do a welfare check at Banks’s apartment.

The officers who responded found Banks on the first floor of the apartment, naked and dead from a gunshot wound to the back of the head. LaBelle was found naked and dead on the second floor from multiple gunshot wounds to his body.

As the trial moves forward, Chong Yen said jurors will see and hear multiple kinds of electronic evidence that puts Keville in the area of Banks’s apartment at the time of the murders.

The jurors will also see texts that Keville wrote to his mother, words that Chong Yen said “are the words of a man who just murdered” Banks and LaBelle.

In her opening statement to the jury, Schwartz stressed that Keville did not shoot either Banks or LaBelle; that he is not guilty of any of the charges against him, and that there was a lack of “any real evidence.”

“Pay attention,” Schwartz told the jurors, “to what you are not going to hear,” about forensic evidence — blood, hair, fingerprints, gunshot residue — to show that Keville killed Banks and LaBelle.

On the evening before her death, Banks had reached out to Keville via text and they were supposed to meet later after she left Fagin’s, said Schwartz. When he couldn’t contact her, Keville went to the Gorham police and asked them to check on her.

Police checked Keville’s body, his clothes and his truck for physical evidence, said Schwartz, but found nothing “because Craig didn’t do this. He’s not guilty.”

Authorities have never recovered the Ruger 9mm pistol used in the murders, she said, nor can they link it to Keville or prove that he disposed of it after the murders.

After the state and defense have presented their arguments, Schwartz said, Judge Peter Bornstein will instruct jurors on direct and circumstantial evidence.

“This,” she said, “is a circumstantial-evidence case.”