Justice Reversed: Harmony Montgomery’s Father Sees Murder Conviction Overturned

Adam Montgomery, the father of the late Harmony Montgomery, recently saw his murder conviction overturned, despite previously receiving a life sentence for the tragic death of his five-year-old daughter.

In a surprising turn of events, the New Hampshire Supreme Court ruled on Thursday morning to overturn the conviction. The decision was based on the court’s finding that Adam was subjected to an improper trial due to being charged with multiple offenses simultaneously, as reported by WMUR.

Adam, aged 36, was initially found guilty in 2024 for the murder of Harmony, who vanished in December 2019. Harmony was a vulnerable child, notably blind in one eye, making her disappearance all the more heartbreaking.

While this ruling alters his conviction status, it does not imply that Adam will be released from prison.

Details from the time of Harmony’s disappearance revealed that Adam had violently attacked her, repeatedly striking her in the face following a bathroom accident while she slept in a car.

He and his wife, Kayla, Harmony’s stepmother, then took opioids and ate fast food as Harmony died of her injuries in the backseat. Her body has never been found. 

Adam was convicted of second-degree murder, abuse of a corpse, witness tampering, and falsifying physical evidence.

But in October 2025, Adam’s lawyer argued that his client should have been tried separately on the assault and murder charges. 

Adam Montgomery was granted the shocking second chance on Thursday morning after the New Hampshire Supreme Court determined that he was tried for too many convictions at the same time

Adam, 36, was found guilty of murdering Harmony in 2024 after the little girl disappeared in December 2019

The state argued that the joinder, or combining multiple criminal charges, was ‘harmless,’ but supreme court justices disagreed. 

‘We conclude that the misjoinder of offenses was not harmless as to the homicide charge. Accordingly, we reverse the defendant’s conviction of second-degree murder,’ justices determined. 

Adam’s lawyer also argued that the court should not have allowed Kayla’s testimony, and that police bodycam footage should not have been shown at the trial, according to the outlet. 

Kayla was released on parole after serving 18 months as part of a 2022 plea deal. 

She pleaded guilty to lying to a grand jury about not knowing what happened to her stepdaughter, and agreed to testify against Adam at his murder trial. 

Kayla confessed to being in the car when her estranged boyfriend beat Harmony to death, and that she helped him hide her body for months. 

During the trial prosecutors described how the child-killer moved Harmony’s body into different containers and places as her body decayed. 

The locations included the trunk of a friend’s car, a cooler in the hallway of his mother-in-law’s apartment building, the ceiling vent of a homeless shelter and an apartment freezer. 

Kayla, Harmony’s stepmother, was released on parole after serving 18 months as part of a 2022 plea deal

At one point, Kayla said that Harmony’s body was kept in a tote bag from a hospital maternity ward.

Kayla said she placed the tote bag in between her own young children in a stroller and brought it to her husband’s workplace.

Investigators described how Montgomery finally disposed of the body in early March 2020 with a rented moving truck.

Harmony’s mother, Crystal Sorey, who did not have custody of her daughter, called Montgomery a ‘coward’ following his verdict.

‘He’s a coward. He’s a coward, he’s always been a coward’ she told reporters outside court.

‘That’s why he did what he did. He took her away from the people that loved her because he couldn’t hack that he didn’t have control. That’s all he cared about, control, everything in his life. She wasn’t anything to him’ she explained.

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