Donald McNeely pleaded guilty Thursday to second-degree murder and was sentenced to two years in prison.
McNeely's daughter, Nikki Bryant, said no crime was committed and said the shooting was an act of mercy.
"He loved my mother," Bryant said. "He still loves her very, very much."
In fact, Bryant said he loved her so much that he was willing to give up his own freedom to end her suffering.
"I think that was his only option," she said. "It was very much a mercy killing."
A brain tumor ravaged Linda McNeely's body, and Bryant said it also broke her spirit.
"She was suffering beyond anything I'd ever seen. She couldn't move without screaming. The neighbors could hear her screaming, she was in so much pain," Bryant said.
Bryant said her mother wanted to end her own life with a lethal dose of medication under Washington's Death with Dignity Law, but her particular diagnosis took that option off the table.
"I heard her tell my dad that she wanted him to shoot her. We all said, 'Oh mom, come on now,' (but) she was like, 'No, I'm done.' She didn't want to live anymore," Bryant said.
In the end, Linda was too weak to commit suicide on her own, so her husband fulfilled her dying wish before calling his children to tell them what happened, according to Bryant.
"We just cried, knelt over her body and cried," Bryant said. "Then the cops had surrounded the neighborhood."
McNeely called the police himself, and when they arrived he was arrested and later charged with murder. A judge could have sentenced him to 18 years in prison, but he instead handed down a two-year sentence.
Bryant said she will wait to spread her mother's ashes until her dad gets out of prison