A juror in Lindsay Clancy’s murder trial said the lone holdout on the jury exhibited “disgusting” behavior during deliberations, appearing to act out one of the killings, scrolling on his phone during deliberations, and refusing to produce evidence to support his objections to an acquittal.

In an interview with ABC News that aired Thursday on “Good Morning America,” Nick Dargie, 25, the first male juror to speak publicly after the trial, said he confronted the man after he picked up an exercise band that Clancy used in the slayings of her three children, tied in around a water bottle, and pulled on it in an apparent simulation of the crime.

“I was just so shocked that he did that,” Dargie told ABC reporter Aaron Katersky. “We’re not in here to play detective. It’s not a game of Clue.”

Dargie, who was juror number 10 in the case, said that as the 38 hours of jury deliberations progressed, multiple jurors who initially leaned toward a guilty verdict came to agree that Clancy was not guilty by reason of insanity after reviewing the evidence.

“There were times where you know our vote was different than the last day, but I think ultimately once we laid out all the evidence and how we saw it, that really brought everyone kind of on the same page,” Dargie said. “Except for this one juror.”

Dargie said the holdout juror could not cite evidence for his objections to a not guilty verdict.

“There were several times I would ask him to show us evidence or describe a witness testimony that helped to prove what he was saying,” he said.

At times he refused to engage in discussions and was seen scrolling on his phone as other jurors tried to talk to him, Dargie said.

“There wasn’t a single piece of evidence or witness testimony that he used to prove why he was thinking the way that he was,” Dargie said. “It was definitely frustrating … we felt defeated.”

With the jury unable to reach a unanimous verdict, Judge William Sullivan declared a mistrial in the case.

Dargie, the latest juror to speak to the media this week in the high-profile case, said at one point the holdout juror said he felt that neither the prosecution nor the defense had proved their case.

At trial, Clancy’s defense team argued she was suffering from postpartum psychosis during the slayings and couldn’t resist a man’s voice in her head that told her to kill the children and herself.

Under state law, prosecutors must convince jurors beyond a reasonable doubt that Clancy was sane at the time of the killings to support a guilty verdict.

Dargie said he respects the right of a juror to disagree over the evidence, but said the jury decided to send a note to Sullivan about the situation after finding the lone juror refusing to engage.

“Otherwise, there’s nothing wrong with somebody having a completely opposite opinion,” Dargie said. “That would be a hung jury. That is our justice system.”

Dargie, who was in the military overseas at the time of the 2023 slayings and came into the trial with no knowledge of the case, detailed the personal toll it took on him and how he “can’t close my eyes without imagining those kids.”

He said he will never forget the “horrifying” tape of Patrick Clancy’s 911 call played in court.

Responding to a question about unfounded internet conspiracies that have circulated about Patrick Clancy, Lindsay Clancy’s former husband, Dargie said that anyone who heard that call, which was not released publicly, “would change their mind.”

Patrick Clancy, through a lawyer, has threatened legal action against online commentators who defame him, while Lindsay Clancy’s defense attorney, Kevin Reddington, called on conspiracy theorists to stop.

Plymouth District Attorney Timothy J. Cruz has not said whether prosecutors will retry Clancy, and Reddington has expressed a willingness to discuss a plea deal.

Dargie said he believed most juries would vote to acquit Clancy.

“I think if they tried the trial again the way they did, I think nine times out of 10, I think the jury would come back with not guilty by reason of insanity, no doubt.”

This is a developing story and will be updated.

Bryan Hecht can be reached at bryan.hecht@globe.com. Follow him on Instagram @bhechtjournalism.