(Portland, OR) -- Sentencing is scheduled early next year for a 58-year-old man who strangled a woman to death inside his van over the summer. Terry Hickman pleaded guilty yesterday to first-degree manslaughter and second-degree attempted assault for the death of 29-year-old Dallas Boyd in July. Court documents show he strangled her to death following an argument inside his van. Hickman is facing 17 years in prison.