A Brunswick police officer accused of assaulting a minor in December was disciplined three times prior to the alleged assault, according to internal police department documents.

Nathan Day, 26, was charged with Class D assault on March 18. The alleged misdemeanor assault occurred on Dec. 18, one day before Day was placed on administrative leave, according to a complaint filed in West Bath District Court.

Day was formally disciplined three times before the alleged assault — in September 2023, July 2025 and again in August 2025, according to department records obtained Monday through a public records request.

In the August 2025 incident, Day was disciplined and was required to complete remedial training after reportedly tackling a suspect.

The other two disciplinary reports involve Day operating a police car and pursuing another vehicle in ways that violated department policy.

The department heavily redacted police reports requested from the day of the alleged assault in December, citing a privacy exception to public records laws. Additional court documents that would describe the nature of the assault weren’t available Tuesday. Efforts to reach Day were unsuccessful.

Andrew Wright, a Brunswick-based attorney, said he is representing the victim in the alleged assault, whom he describes as a 17-year-old girl still dealing with medical issues resulting from the alleged assault.

In an email Tuesday, Wright said the victim was knocked unconscious by Day and had to be hospitalized multiple times as a result.

Brunswick Police Chief Scott Stewart confirmed last week that Day is still on administrative leave but declined to comment on the charge, calling it an active personnel issue. Stewart said when an officer is placed on administrative leave, the department conducts an internal affairs investigation focused on department policy.

Wright said last week that he’s grateful that the Office of the Maine Attorney General brought assault charges against Day for the December incident, adding that “there is no place in Maine for this type of violence against our children.”

“Mr. Day deserves to have significant consequences for his actions and will hopefully never be in a position where he can harm our citizens again, especially children,” Wright said in a written statement. “Police officers like Mr. Day should never taint the reputation of good law enforcement officers and absolutely should never terrorize and harm our children.”

When tackling a suspect in August, Day reportedly used force that “did not comply with … department standards” and was “unreasonable or unnecessary for the particular circumstances,” one disciplinary record reads.

“It has been made clear that Officer Day must learn from this experience,” the document says. “And he understands that he will receive remedial training from our Defensive Tactics Unit.”

Stewart, the Brunswick police chief, confirmed Tuesday that Day completed the required training but did not comment further on Day’s disciplinary records.

Day was also disciplined in 2023 for reportedly operating his police cruiser in an aggressive manner that violated department policy. And in an additional report dated July 15, 2025, he was disciplined for pursuing a driver in his cruiser without probable cause or suspicion of a serious crime.

“It is clear (officer) Day was being a bit too tenacious in his attempt to initiate (motor vehicle) stops,” a supervisor wrote in the 2023 disciplinary record. “(Officer) Day is an aggressive officer when it comes to (motor vehicle) enforcement. I am confident this will not continue to occur.”

According to the disciplinary records, Day received oral or written reprimands and was not suspended, demoted or discharged in any of the three incidents. Day did not dispute any of the disciplinary actions. The records don’t delve into what happened during the incidents for which Day was admonished.

Day, of Gardiner, has worked at the Brunswick Police Department since May 2022, according to records from the Maine Public Employee Retirement System. He previously worked for the town of Brunswick as a Public Works truck driver from March 2020 until he was hired at the police department, Town Clerk Fran Smith said.

Day is scheduled to be arraigned at West Bath District Court on May 5.