Massachusetts lawmakers heard emotional testimony this week from a couple who tried unsuccessfully to adopt a 5-year-old girl who was placed in the care of her drug abusing, ex-convict father, who is now charged with her murder.

"Today was difficult, but not nearly as difficult as the hell that Harmony endured every single day after Massachusetts handed her over to a murderer," Johnathon Bobbitt-Miller told Fox News Digital after the hearing. 

Bobbitt-Miller and Blair Miller had previously adopted Jamison, the half-brother of Harmony Montgomery, and wanted to bring her into their household to reunite the siblings.

MASSACHUSETTS WATCHDOG FINDS ‘MISCALCULATIONS’ PRECEDED GIRL'S DISAPPEARANCE

Search For Harmony Montgomery in Massachusetts estuary

Massachusetts police search areas off Route 107 as part of the investigation into the disappearance of Harmony Montgomery, who authorities allege was killed by her father.  (Suzanne Kreiter/The Boston Globe via Getty Images)

However, after her father Adam Montgomery got out of prison for a drug robbery and shooting, a Massachusetts family court judge agreed to place the girl in his care. Harmony had never met her father before. He was in prison for shooting a man in the face when she was born.

Montgomery soon collected welfare payments on behalf of the child, and his estranged wife was accused of continuing to receive them for months after Harmony was last seen alive. Kayla Montgomery is now cooperating with investigators in the murder case against her husband.

Missing Harmony Montgomery and her little brother Jamison at a foster home more than two years ago.

Missing Harmony Montgomery and her little brother Jamison at a foster home before she went missing in fall 2019.  (Courtesy: Johnathon Miller)

"Harmony’s fate was sealed the minute she became a number and/or a case load," Bobbitt-Miller said. "She’s more than that to us, and we won’t stop fighting until change happens."

HORRIFYING NEW DETAILS OF HARMONY MONTGOMERY'S MURDER REVEALED IN UNSEALED AFFIDAVIT

A group of lawmakers is seeking to establish a new "Harmony commission" designed to "study and make recommendations related to the welfare and best interests of children in care and protection cases."  

Undated portraits show Harmony Montgomery smiling

Harmony Montgomery was reported missing two years after she was last seen alive. She has never been found, but police have accused her father of beating her to death and hiding her remains. (National Center for Missing and Exploited Children)

A watchdog investigation last year found serious "miscalculations" in the family court system's decision to hand Harmony over to her father before her disappearance and presumed murder. The Millers are asking supporters to reach out to their state representatives and senators and urge them to vote in favor of H.4088 and S.118.

"We now live in Arlington, Virginia, and came back to Massachusetts to officially adopt Jamison at National Adoption Day in November of 2019," Blair Miller told the Massachusetts Senate's Joint Children, Families and Persons with Disabilities Committee at an hours-long hearing Tuesday. 

"We now know that just days later, while we were celebrating Jamison's birthday back in Virginia, Harmony was being brutally beaten. She was being attacked and eventually killed. The same day."

Manchester Police Chief Allen D. Aldenberg composes himself during emotional Harmony Montgomery news briefing

Manchester Police Chief Allen D. Aldenberg takes a moment to collect himself as he announces that Adam Montgomery has been charged with the murder of his 5-year old-daughter, Harmony. (Jessica Rinaldi/The Boston Globe via Getty Images)

It took years, however, before anyone even knew something was wrong. Adam Montgomery is now accused of beating her to death while abusing drugs and living out of a car, then hiding her body. He has pleaded not guilty.

The unwitting Millers spent years trying to reach him and reunite her with her brother.

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Adam Montgomery is an ex-con and heroin addict.

Adam Montgomery got out of prison following a drug robbery and shooting and convinced a Massachusetts court to grant him custody of his daughter Harmony, who vanished months later. He is accused of killing her and hiding the evidence. (Manchester Police)

Her biological mother, who had forfeited custody years earlier due to her own struggles with drug abuse, learned in 2021 from school officials that Harmony had never been enrolled. 

Anyone with information about Harmony Montgomery is asked to call a 24-hour tip line at 603-203-6060.

Harmony's remains have not been found. However, investigators say they've found her DNA in several locations they believe her father concealed her body before he allegedly rented a U-Haul van and dumped her remains in a marsh outside Boston.