CONCORD, N.H. (WHDH) - New Hampshire officials announced that the investigation into Harmony Montgomery’s disappearance is now a homicide investigation.

Though they have not found her body, the Attorney General and Police Chief said that “biological evidence” and other sources of investigation brought them to this conclusion.

“I know that over the past eight months, there have been many discussions, speculations and questions relative to where the system failed Harmony, and I myself continue to share the same concerns and still have many remaining questions,” said Manchester Police Chief Allen Aldenberg.

The investigation determined that she was murdered in Manchester in early December 2019. She was 5 at the time.

“Any loss of human life is tragic. But cases like this that involve young children and young girls like this are especially difficult,” said NH AG John Formella.

Officials cannot give a further update on the case as the investigation is still ongoing.

“We understand that this is truly devastating news for Harmony’s family, friends and loved ones,” Formella said. “This is also devastating news for the city of Manchester, for our state and all who have followed this story. Our work now turns to getting justice for Harmony and all those who loved her.”

As 7NEWS previously reported, police searched a Manchester, New Hampshire home in June in connection with the case, at one point hauling a refrigerator out of the building.

Officials from the Manchester Police Department and other agencies were on Union Street at the former home of Harmony’s father, Adam Montgomery, and stepmother, Kayla Montgomery. Harmony Montgomery was last seen in 2019 when she was 5 years old and under her father’s custody. She wasn’t reported missing until 2021.

Sources told 7NEWS that newly developed information led them to the apartment.

By late afternoon, a DPW crew was using a high-tech camera in the sewer line below Union Street outside the apartment.

Harmony’s biological mother, Crystal Sorey, told 7NEWS by phone she always had a bad feeling about that apartment.

“I don’t know what they’re looking for, really, but I’m hoping that it just brings us closer to getting answers,” she said.

Adam Montgomery is currently in jail on charges including that he hit his daughter.

In January, police dug up a backyard in Manchester where Harmony last lived but were unable to locate any signs of the missing child.

Holding back tears, Aldenberg pleaded for those with information on what happened to come forward.

“Harmony is a sweet and innocent child who deserves to be brought home to her family,” said Aldenberg.

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