LAMOINE, Maine — State police say a Maine man had exhibited erratic behavior before using two guns to kill his father and uncle in Lamoine, Maine.

State police say family members told investigators that 27-year-old Leon Tilden appeared to be depressed and had a number of guns in his cabin. They said he’d been staying up late, shooting at raccoons and other animals in the middle of the night.

Autopsies showed his father, Robert Tilden, and his uncle, Russell Pinkham, both 50, died from multiple gunshot wounds early Tuesday. Leon Tilden was later shot to death in a confrontation with state police.

Steve McCausland of the Maine Department of Public Safety said investigators have yet to determine the motive and may never know what caused Tilden to kill his father and uncle.

On Tuesday, the Hancock County Sheriff’s Department called for reinforcements after receiving the 911 call shortly after 3:30 a.m. and failing to locate Tilden, who’s accused of killing the men outside his father’s house.

The victims lived next door, McCausland said. Tilden’s mother and his brother also were at home when the violence erupted but weren’t harmed.

Pinkham worked as a truck driver and Robert Tilden worked as a bloodworm digger, said Stu Marckoon, an administrative assistant to the board of selectmen.

“Both of them were the nicest guys you’d want to meet,” Marckoon said. “They were delightful when they’d come into the office to transact whatever they needed to transact. They were just good down-to-earth folks.”

Robert Tilden was featured on the Discovery Channel’s “Dirty Jobs,” demonstrating how to dig bloodworms for host Mike Rowe.

It was the second fatal shooting this year in Lamoine, a town of 1,600 residents located on the mainland across Eastern Bay from Mount Desert Island. Marckoon said it was unusual to have two violent episodes in the quiet town in less than a year.

In March, a man was shot to death and two others were wounded following a dispute outside a home.