(Portland, OR)  --  A man who pleaded guilty to manslaughter in the death of his domestic partner is headed to prison.  Salathiel Laroy Dale entered the plea earlier this month in the death of Duane Bailey, and was sentenced yesterday to 15 years with credit for time served.  Police say Bailey died at a hospital in July 2013, following a disturbance at a home on Northeast Going Street.  Dale avoided a murder trial by pleading guilty to the manslaughter charge.