Harmony Montgomery murder: Jury reaches verdict in Adam Montgomery trial

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Blair Miller explains the abusive past of missing 7-year-old Harmony Montgomery

Fox Nation’s ‘Crime Stories w/ Nancy Grace’ goes inside the case of the missing seven-year-old.

Jurors found New Hampshire father Adam Montgomery guilty in the murder of his 5-year-old daughter Harmony after about six hours of deliberation over two days.

Prosecutors said during the two-week trial that after beating the helpless child, her father shot up opioids and ate fast food as she died in the back seat of his car as she died from her injuries.

After he realized she was dead, according to investigators, he concealed the body for months, heartlessly crushing her into a duffel bag and then a cooler and coating her with lime to reduce the odor of decomposition.

DAD BEAT DAUGHTER, THEN ATE FAST FOOD AND DID DRUGS AS SHE DIED IN BACK SEAT OF CAR, PROSECUTORS ALLEGE

Adam Montgomery enters the courtroom for jury selection ahead of his murder trial at Hillsborough County Superior Court in Manchester, New Hampshire on Tuesday, February 6, 2024. Montomgery is accused of killing his five-year-old daughter, Harmony. (David Lane/UNION LEADER POOL)

Eventually, he allegedly rented a U-haul truck and dumped her battered remains “like trash” somewhere outside Boston.

Then he said nothing for nearly two years. Harmony was finally reported missing when her frustrated noncustodial mother, Crystal Sorey, discovered the child had never been enrolled in school. Manchester police declared her a missing person in December 2022.

Adam Montgomery, a 33-year-old violent New Hamsphire felon and drug addict, had somehow been awarded custody after his release from prison for shooting a drug dealer in the face, even as her brother’s adoptive parents were actively trying to add her to their family.

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Harmony Montgomery was reported missing two years after she was last seen. Her father was soon arrested on murder charges in connection with her 2019 disappearance, which they alleged followed a brutal beating in the back of his car. (National Center for Missing and Exploited Children)

A Massachusetts watchdog agency later found that the state’s child welfare system did not prioritize her “needs, well-being and safety” in placing her in her father’s care.

While collecting welfare on her behalf, he lived out of a car with his now-estranged wife Kayla, whom he is also accused of beating, and continued to use drugs, prosecutors said. Her testimony at trial is key evidence in the case.

As part of a plea deal, Kayla Montgomery gave investigators damning testimony implicating her husband on charges that include second-degree murder, abusing a corpse and falsifying evidence. She told detectives that Adam Montgomery kept Harmony’s corpse for three months, repeatedly hiding it in new places before allegedly dumping it somewhere near Boston. Although the girl’s body has not been recovered, investigators allegedly found her DNA in at least one location where he allegedly stowed it.

FATHER OF SLAIN NEW HAMPSHIRE GIRL ORCHESTRATED SAVAGE PLOT TO HIDE HEINOUS CRIME: PROSECUTORS

Kayla Montgomery, the estranged wife of Adam Montgomery, becomes emotional while being cross-examined by Defense Attorney Caroline Smith during Adam Montgomery’s murder trial in Hillsborough County Court on Monday, February 12, 2024 in Manchester, New Hampshire. Adam Montgomery is accused of killing his daughter, Harmony, in 2019. (Jeffrey Hastings/Pool)

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On Dec. 7, 2019, the day investigators believe Harmony died, she had soiled herself in her sleep, prosecutors said. Her father allegedly beat her over the head viciously, telling his wife, “I think I really hurt her this time.”

Then they went to a methadone clinic, picked up drugs, and got fast food, prosecutors said in their opening statement.

Kevin Montgomery, the defendant’s uncle, gives testimony during the Adam Montgomery trial in Hillsborough County Court on Friday, February 9, 2024 in Manchester, New Hampshire. Kevin Montgomery is one of the first witnesses to report alleged child abuse to authorities after claiming he saw Harmony with a black eye before she went missing. (Hans Pennink for Fox News Digital )

Little Harmony had another accident, prosecutors said. Her father turned around and beat her again. She died, moaning and gurgling, as prosecutors said he ate his food and shot up some drugs.

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He is already serving a minimum of 32 and a half years in prison for an unrelated firearms case – and has pleaded guilty to lesser charges in connection with Harmony’s death.

Harmony’s remains have not been found.

Michael Ruiz is a reporter for Fox News Digital. Story tips can be sent to michael.ruiz@fox.com and on Twitter: @mikerreports