This photo provided by the Concord Police Department shows New Hampshire state Sen. Jeff Woodburn. Woodburn, the Senate's minority leader, faces charges including simple assault, domestic violence and criminal mischief stemming from the encounters that took place both last year and this year. Woodburn is accused of hitting and biting a woman and kicking in the door of her house. (Concord Police Department via AP)
This photo provided by the Concord Police Department shows New Hampshire state Sen. Jeff Woodburn. Woodburn, the Senate's minority leader, faces charges including simple assault, domestic violence and criminal mischief stemming from the encounters that took place both last year and this year. Woodburn is accused of hitting and biting a woman and kicking in the door of her house. (Concord Police Department via AP)

Concord — A diary kept by state Sen. Jeff Woodburn backs up key details at the heart of a string of domestic abuse charges filed by the Attorney General’s Office, an investigator wrote in an affidavit unveiled on Tuesday.

In diary entries spanning back a year, Woodburn detailed two out of four events at the center of the charges against him, according to the affidavit. The state senator, a Democrat from Whitefield, was arrested on Aug. 2 and charged with nine counts including domestic violence.

On Aug. 12, 2017, Woodburn recalled losing his temper after an argument two days earlier, according to the affidavit.

“I responded by kicking the door off the dryer, we have not communicated since that night, I feel bad about the whole thing,” he said.

The following Christmas Eve, Woodburn added, the arguments continued, and the anger followed.

“I’ve had a few explosive moments with (redacted) … it’s becoming regular and it scares me,” a Dec. 25 entry states.

On Dec. 24, “I became enraged and kicked the door in busting up the framing around the door,” Woodburn wrote.

In that entry and others, he expressed regret. “Mind is sad and focused on my failure to control my anger,” he wrote on Dec. 25.

The entries were obtained by the victim and handed over to the Attorney General’s Office, the affidavit stated. The public version of the arrest affidavit, unveiled in a petition by the Berlin Daily Sun, redacts all references to the victim’s name and identifying details.

“It’s so embarrassing-upsetting,” Woodburn wrote Dec. 25. “It just keeps repeating itself in my brain … 52 years old I need to grow up! I risk so much and hurt people who I should be loving.”

Woodburn, a three-term senator representing the North Country in District 1, is planning to fight the charges at a trial set for December. He stepped down from his position as Senate minority leader in August but declined to give up his seat in the chamber, despite widespread calls by top Democratic officials and Senate colleagues to do so.

As he prepares to battle the charges, he’s also fighting for his political future. Last month, he won his party primary, overcoming a last-minute write-in challenge from Kathleen Kelley, who threw her hat in the ring after his arrest.

Woodburn declined to comment directly on the affidavit on Tuesday, referring queries to his attorney, Donna Brown. In a phone call, Brown declined to address details in the affidavit, urging the public to wait for the full facts to emerge.

“I reiterate what the judge said in the order releasing the affidavit, which is that Jeff Woodburn is presumed innocent and everybody should presume that he’s innocent,” she said. “His case should not be tried in the court of public opinion but should be tried at his trial.”

Prosecutors say the abuse toward Woodburn’s fiancee began in August 2017. They had been in a relationship since 2015.

The investigation began on July 25, with an interview involving Deputy Chief Investigator Todd Flanagan, the victim’s attorney and Senior Assistant Attorney General Geoffrey Ward.

Speaking to investigators, the victim described an “up-and-down relationship,” and characterized Woodburn as “controlling.”