Jan DeMeerLeer and Rebecca Schiering seemed like they had a good life ahead of them. He was a divorced engineer. She was his fiancee; a mother of three, formerly homeless, who had turned her life around and now owned a Spokane consignment shop. On his Facebook page, the 39-year-old DeMeerLeer described himself as “first and foremost a family man…love my kid and potential step children.” But Sunday night all that changed.That’s when Schiering’s 17-year-old son awoke to find DeMeerLeer on top of him, slashing his neck with a knife. The boy managed to fight off the much older man. Then he went to the kitchen and found his mother dead of a gunshot wound. Rebecca Schiering had overcome homelessness and addiction problems. She owned her own clothing store at the time of her murder.When police arrived, they found one of the boy’s two 9-year-old twin brothers had also been shot in the head. The old teen survived his wounds. The young boy did not; he was first put on life support, but has now been declared brain dead.Neighbors told The Spokesman-Review that Schiering had moved out of DeMeerLeer’s house six months ago. One of the twin boys, who was autistic, had been injured by DeMeerLeer during a “domestic violence incident.” Schiering’s neighbors also said that another man had been seen helping her in her new duplex, and that her ex-fiancee suffered from bi-polar disorder.DeMeerLeer was found dead late Sunday night in the garage of his Northwood home. The man who had written that “immediate family is the primary focus of my life” had taken his own.