Former Lawrence Police Captain Michael Mangan faces federal charges related to alleged excessive force against a man arrested for a noise complaint in 2023.

Mangan faces two counts each of deprivation of rights under color of law and false report. Mangan pleaded not guilty to the charges at an initial appearance at federal court in Boston Wednesday.

The indictment filed Tuesday does not contain many details of the alleged incident spurring the charges, except that on March 10, 2023, Mangan “assaulted arrestee Victim 1, willfully depriving Victim 1 of the right … to be free from the use of unreasonable force by a law enforcement officer.”

Mangan filed two reports regarding the incident which prosecutors accuse him of falsifying.

In each, he described the arrestee’s conduct during the booking process “assaultive,” thus justifying a forceful response. In the supplementary report, Mangan alleged the arrestee “slightly turned and bladed his body toward” him “and simultaneously threw his right arm and outstretched hand at a high rate of speed toward [Mangan’s] face with his fingers in a grabbing motion.” Mangan wrote that he responded with “a straight arm take down.”

The indictment returned by the federal grand jury is skeletal in details, but more information is found in the federal civil rights lawsuit filed by Sodiq Folarin Amusat, the 29-year-old Black man Mangan is accused of assaulting, against Mangan and the city of Lawrence.

In the complaint, Amusat states that he was arrested on March 10, 2023, after a neighbor had complained about the volume of the music in his apartment. His encounter with Mangan occurred at roughly 3 a.m., the complaint states.

“During the booking process, Mangan, a white Captain of the Lawrence Police Department, suddenly and without warning, viciously ‘clotheslined’ Mr. Amusat,” the complaint states. “Mangan’s unprovoked attack drove Mr. Amusat’s head into a metal door and onto the concrete floor.”

Mangan “needlessly tackled, forcibly pressed onto the ground and handcuffed” Amusat, according to the complaint, all of which was “captured on a surveillance video recording.”

Amusat’s complaint states that he made no aggressive movements toward Mangan but instead “did not physically resist the police officers, did not attempt to flee and did not verbally threaten the officers.”

The complaint contains stills from the surveillance video footage of the encounter and purports to show that Amusat was actually speaking with the other officer when “suddenly and without warning,” Mangan lunged and stiff-armed Amusat, wrapped his right arm around him and placed his right leg behind Amusat’s legs — a “clothesline” maneuver — forcing the arrestee to the ground, and striking his head against the wall and ground.

Magistrate Judge Donald L. Cabell on Wednesday released Mangan under standard release conditions because the prosecution did not seek detainment, according to clerk notes. Mangan has secured private counsel which will file an appearance later, according to a public defender at the arraignment. An initial status conference is set for Dec. 17.