(Wilsonville, OR)  --  A man accused of killing his girlfriend in Port Orchard, Washington is now behind bars in Portland.  Authorities say 33-year-old David Kalac murdered Amber Coplin and anonymously posted graphic photos of her body on the Internet.  Police say Kalac became the subject of a manhunt after Coplin's car was found abandoned in Portland.  Officials say Kalac was arrested yesterday after he approached a Wilsonville police officer and said there was a warrant out for his arrest.