25 Investigates

Father of missing N.H. girl is suspect in unsolved Massachusetts murder

LYNN, Mass. — The father of missing New Hampshire child Harmony Montgomery, is a suspect in an unsolved murder in Lynn, Massachusetts, according to a law enforcement source close to the investigation.

Adam Montgomery is held without bail in a New Hampshire jail, charged with physically abusing Harmony in 2019.

Adam had legal custody of Harmony and no one has seen her in two years.

According to a police affidavit, Adam Montgomery is refusing to tell investigators anything about Harmony’s whereabouts.

But now, Boston 25 News has learned that Adam Montgomery has even more legal trouble on the horizon.

According to a knowledgeable law enforcement source, Adam Montgomery is a suspect in the murder of Darlin Guzman in Lynn in 2008.

On February 10, 2008, just before 11 pm, police found 28-year-old Darlin Guzman fatally shot in the parking lot of the former White Hen Convenience store in Lynn’s Austin Square.

Guzman was shot in the chest.

First Responders transported Guzman to a nearby hospital where he was pronounced dead.

At the time of the murder, Lynn Police described the suspect as a light-skinned man in his twenties, about six feet tall, wearing a red hooded sweatshirt. He drove away in a red Honda Accord up Boston Street, towards Saugus.

According to my law enforcement source, Adam Montgomery, along with two members of his family, have been the focus of this murder investigation almost since day one.

I’m told the investigation revealed that Adam, and two members of his family, interacted with Guzman earlier that day. And that they agreed to meet up at the White Hen in Lynn.

The result of that meeting was deadly gunfire.

Guzman’s car was recovered days later in a cul de sac in Billerica, which is in the direction of Bedford, NH, where Adam was living with his family at the time.

Adam Montgomery was 18 years old at the time of the Guzman murder. He was already facing various criminal charges in New Hampshire and was free on bail.

To date, neither Adam Montgomery nor anyone else, has been charged with Guzman’s murder. But I am told Adam Montgomery remains a focus of this open and very active investigation.

The Manchester, New Hampshire Police Department is aware that Adam Montgomery is a suspect in the Lynn, Massachusetts murder.