Two people have been arrested in the death of a 22-year-old man who's body was found in a burned out car in Sunnyside. The Yakima County Coroner has identified the body as that of  Preston Yahne. Detectives say a tow truck driver found Yahne's body on June 18 while removing a car from private property along Emerald Rd. near Sunnyside. The car was also registered to Yahne. Late last night detectives arrested a 19-year-old female and a 24-year-old male.  Both are Grandview residents.    Information developed in the course of the arrests indicates that the homicide happened in Benton County rather than in Yakima County.  One of the suspects was booked in Benton County and the other at Yakima.  It's expected that Benton County authorities will take custody of the suspect arrested in Yakima County later Today.