(Gresham, OR)  --  Police continue to investigate the homicide of a Portland man in Gresham.  Authorities say 19-year-old Otoniel Hernandez-Duarte was stabbed to death during an argument last Sunday morning during a house party on Northeast 183rd Avenue.  Nineteen-year-old Ariana Marlene Cortez was arrested in connection with the killing.  She's facing a murder charge and is being held without bail.