Lake, 37, shot and killed 38-year-old schoolteacher Amy Lake and their two children, 12-year-old Monica and 13-year-old Cote, with a shotgun before killing himself Monday morning, Wright said. Police also found a flammable liquid poured around the inside of the house, but it wasn't ignited.
Steven Lake was awaiting trial for allegedly holding his family hostage last year in Wellington, where he most recently lived, Wright said. He was free on bail but was barred from contacting his family.
Wright said investigators "may never ever know" what pushed Lake over the edge.
Mylon Lake, of Harmony, told the AP that Steven Lake was his nephew and had been angry over a child custody dispute. Steven and Amy Lake at one time had shared custody, but Steven had recently lost his right to see the children and was particularly upset about the graduation ceremony, he said.
A Dexter police officer went to check on Amy Lake at 8 a.m. Monday at her tidy two-story red clapboard home on the north shore of Lake Wassookeag when she didn't show up for work at the Ridge View Community School and when Steven Lake's car was spotted in her driveway. The officer heard multiple gunshots after pulling into the driveway and called for help.
Neighbor Phil Kreider said local police officers had been checking on Amy Lake every day because she had a restraining order on her husband.