(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.