New Hampshire 7-year-old Harmony Montgomery has been missing since September 2019, and police are asking for anyone with details about her to come forward.

No tip is too small, according to investigators, who set up a dedicated 24/7 tip line at 603-203-6060 for potential witnesses.

On Tuesday, police in her hometown of Manchester, New Hampshire, arrested her father Adam on child abuse and endangerment charges in connection with a 2019 incident that left the partially blind little girl with a…