(Scappoose, OR)  --  Authorities continue to investigate the death of a woman whose body was found in the Multnomah Channel.  She's been identified as 20-year-old Leticia Montez of Vancouver.  She was found near the Rocky Pointe Marina south of Scappoose.  An autopsy showed Montez died of asphyxiation by drowning.  "The Oregonian" reports she had previously been reported to Portland police as missing.