ROME — A Livermore Falls man was shot to death after breaking into a man’s house Saturday evening, state police said.

Christopher Dennison, 44, of Livermore Falls was wearing a ski mask and brass knuckles when he broke into a mobile home on Foss Hill Lane around 8 p.m. Saturday, according to a statement by Steve McCausland, spokesman for the Maine Department of Public Safety.

Homeowner Richard Duffy, 48, shot Dennison after a brief altercation in the living room, McCausland said. An autopsy by the State Medical Examiner’s Office showed Dennison died from multiple gunshot wounds.

Duffy and his teenage son were watching television when Dennison entered the home, McCausland said. They were not injured, he said.

Dennison broke through a door into the home, he said. It was unknown Monday afternoon what he was seeking.

State police have learned that a second man was in Dennison’s vehicle outside the home, and heard the gunshots and took off, McCausland said. Police located him Sunday and spoke to him, he said.

There was no indication that Dennison and Duffy knew one another, he said.

Detectives are continuing to investigate the circumstances of the shooting and no one has been charged, he said.

The case will also be reviewed by the Maine Attorney General’s Office.

Livermore Falls police Chief Ernest Steward Jr. said that the last contact police had with Dennison was to serve a subpoena in August 2012 at his residence, listed then, as 80 Hunton Loop in Livermore Falls.

Livermore Falls police issued Dennison two citations for speeding in 2007 and 2009. Police arrested him on a warrant for an upaid fine in 2007, Steward said.

He was found guilty in 2007 of operating under the influence in a Kennebec County court in Augusta, according to court information. He paid a $750 fine.

State police also arrested Dennison on May 18 on a charge of operating under the influence after he lost control of his motorcycle and crashed on Route 27 in Pittston, according to State Police Troop D call entries on its website. It was unclear what stage that charge was in or if it had been dismissed.