Newport — A 19-year-old Grantham man accused of hitting a New Hampshire state trooper several times in the head has pleaded guilty to second-degree assault.

Michael Dolan will serve two to five years in New Hampshire State Prison for striking Trooper Michael Catalfamo during a call for service at a Grantham home in February.

Dolan, who pleaded guilty last week, must pay restitution in the amount of $4,600. He has remained in jail since his Feb. 19 arrest, so he has about three months of pre-trial credit that will go toward his minimum sentence.

State Police Lt. Michael Commerford said on Thursday that Catalfamo has since returned to work. He sought medical treatment for a concussion at the hospital following the incident and subsequently attended physical therapy appointments.

“Trooper Catalfamo is doing much better and he as well as other members of Troops C and D were able to attend the sentencing hearing last week for Mr. Dolan,” Commerford said.

He said the officials were pleased with the outcome of Dolan’s court case.

“(The incident) had the potential to be worse and we are thankful that Trooper Catalfamo only sustained the injuries that he did,” Commerford said. “It was a serious event that needed serious consequences. Considering the age of Mr. Dolan, we can only hope that he gets the help that he needs to turn his life around.”

Assistant Sullivan County Attorney Alex Scott, the former Claremont police chief, called the outcome “appropriate.”

“Based on the seriousness of the underlying conduct, the resolution was appropriate,” Scott said on Thursday. “It also sends a message not only to the defendant that that kind of conduct won’t be accepted, but to the community as a whole that that kind of conduct is going to be met with a meaningful sanction.”

Catalfamo, who is part of Troop D in Concord, was the closest trooper to Grantham when a 911 call came in for a domestic disturbance on Miller Pond Road. He was the first one to arrive at the scene.

When Catalfamo went to take Dolan into custody, Dolan hit him several times in the head and face. Catalfamo fell to the ground, and Dolan continued to punch the trooper, according to court documents.

Catalfamo began to lose consciousness and suffered a concussion, State Police Sgt. Daniel Baldassarre said previously.

Dolan faced an additional count of second-degree assault as well as several misdemeanors in connection with the assault, all of which were dismissed as part of a plea deal.

At the time of the incident, Dolan was out on bail on an unrelated offense.

A message left for Dolan’s public defender, Jennifer Cohen, wasn’t returned by deadline.

Jordan Cuddemi can be reached at jcuddemi@vnews.com or 603-727-3248.