New Hampshire child Harmony Montgomery's disappearance is now being investigated as a homicide

Officials are investigating the disappearance of Harmony Montgomery, who was 5 years old when she was last seen in 2019, as a homicide, authorities announced Thursday.

Montgomery's remains have not yet been found, but biological evidence "led us to this difficult and tragic conclusion," New Hampshire Attorney General John Formella said. It was not clear where the evidence was found, but Formella did say that they believe the child was killed in December 2019.

Although Montgomery was last seen in 2019, she was only reported missing in the last week of 2021, sparking a frantic search by police and local officials in Manchester, New Hampshire.