(Silverton, OR)  --  A man who's accused of killing his girlfriend in Silverton nearly a year ago is awaiting sentencing, after pleading guilty to all charges.  Authorities say 43-year-old Jason Clifford Down murdered 50-year-old Cassandra Wagner on August 30th, 2014.  Down pleaded guilty yesterday to multiple charges, including aggravated murder, first-degree burglary and unlawful use of a weapon.  Sentencing is expected to take place next month.