(Cedar Hills, OR)  --  Authorities have a suspect in custody following the stabbing death of a pregnant teenager in Cedar Hills.  KOIN-TV reports 18-year-old Charreen Stanford was five months pregnant when she was stabbed Monday night at her home in the 13-thousand-400 block of Southwest Driftwood Place.  Washington County deputies have arrested 18-year-old Tannekqwa Thompson, who's charged with murder.