(Ridgefield, WA)  --  Authorities say a man whose body was found along a rural dirt road in Clark County is believed to be the victim of a homicide.  The body was spotted early yesterday morning, about two blocks east of I-5 near the community of Ridgefield.  Officials say it appears the body was dumped there after the victim was killed elsewhere.  An autopsy is being conducted to determine the exact cause of death.