Former N.H. Corrections Officer Matthew Millar enters the Merrimack County Superior Court on Tuesday, June 17, 2025. Millar is charged with second-degree murder for causing the death of patient Jason Rothe at the Secure Psychiatric Unit of the Department of Corrections.
Former N.H. Corrections Officer Matthew Millar enters the Merrimack County Superior Court on Tuesday, June 17, 2025. Millar is charged with second-degree murder for causing the death of patient Jason Rothe at the Secure Psychiatric Unit of the Department of Corrections.

The estate of Jason Rothe, a patient at the stateโ€™s Secure Psychiatric Unit who died in 2023 after a physical altercation with corrections officers, is suing the state and several prison employees in a wrongful death lawsuit.

Aimee Khatib, Rotheโ€™s sister and representative of his estate, accused the correctional officers and a department nurse of violating Rotheโ€™s constitutional rights by using unlawful excessive force and failing to follow policies around restraint and medical care. The civil suit, filed in federal court last week, requests a jury trial and seeks monetary damages.

The suit names former prison guard Matthew Millar of Boscawen, supervising officer Lesly-Ann Cosgro of Henniker, four other correctional officers and a department nurse. All except Millar and the nurse are still employed by the Department of Corrections.

It also accuses former commissioner Helen Hanks of interfering with the investigation of Rotheโ€™s death.

A jury acquitted Millar of second-degree murder following a two-week trial in Concord last year. Heโ€™d been accused of causing Rotheโ€™s death by kneeling on his back for several minutes, putting pressure on his lungs.

The third anniversary of Rotheโ€™s death is approaching next week, on April 29.

Rothe, 50, was not serving a criminal sentence but was a patient at the psychiatric unit in the menโ€™s prison in Concord, a secure facility for people with severe mental illness who are deemed by the court system to be dangerous. He was transferred there in 2022 after receiving mental-health treatment for schizophrenia at New Hampshire Hospital since 2017, according to the complaint.

The altercation came when a team of corrections officers tried to extract him from a recreation area after heโ€™d refused to leave several times. In what the suit describes as a โ€œchaotic, unprepared and understaffedโ€ operation, officers tased him eight times, hit him at least eight times and kept pressure on Rothe in a face-down position for several minutes, even after he was cuffed and stopped resisting.

He was then placed in a prone position on a stretcher, although, according to the lawsuit, the Department of Corrections did not have any policies or training for correctional officers on its use. He was not transitioned into a face-up position until 10 minutes after the extraction began, when officers noticed he was not moving or breathing. They then performed CPR.

The medical examiner ruled that Rotheโ€™s death was a homicide caused by compressional and positional asphyxiation.

The lawsuit accuses officers of keeping Rothe in a prone position and kneeling on his back even after he was handcuffed and stopped struggling despite their training on use of force, tasers, restraint and transport policies and the โ€œduty to interveneโ€ when excessive force is being used.

Last year, Millarโ€™s defense argued at his trial that he should not bear the blame because Cosgro, who ordered the extraction, and the Department of Correctionsโ€™ training protocols failed him, placing him into a risky situation without preparation or protection.

The New Hampshire State Prison for Men in Concord, as seen on April 14, 2026.
The New Hampshire State Prison for Men in Concord, as seen on April 14, 2026. Credit: CHARLOTTE MATHERLY / Monitor

The suit also seeks to hold Hanks liable for failing to train and discpline the officers involved, as well as interfering with the investigations by the New Hampshire State Police and the attorney generalโ€™s office.

After Rothe died, according to the lawsuit, Hanks held โ€œunauthorizedโ€ review meetings with each officer and instructed them to revise their statements about what had happened, according to the lawsuit. She later shredded her notes from those meetings, and the attorney generalโ€™s office wasnโ€™t made aware for almost a year, the complaint said.

โ€œSuch alarming behavior committed by Commissioner Hanks to minimize, conceal or sanitize the criminally charged conduct that caused the death of Mr. Rothe demonstrates a tacit approval or ratification of the conduct,โ€ the lawsuit says.

Hanks resigned from her post as commissioner last May, two months before Millarโ€™s trial, amid a slew of tensions with Gov. Kelly Ayotte and lawmakers.

A spokesperson for the attorney generalโ€™s office said they would review the suit and โ€œrespond as appropriate in court.โ€

Charlotte Matherly is the statehouse reporter, covering all things government and politics. She can be reached at cmatherly@cmonitor.com or 603-369-3378. She writes about how decisions made at the New...