( CNN ) -- Oregon authorities have arrested a man accused of killing his girlfriend in Washington state and posting gruesome pictures of her body online . David Michael Kalac , 33 , was taken into custody near Portland late Wednesday by the Wilsonville Police Department . He was wanted on suspicion of second-degree murder . `` Outside of a terrorist attack this is as serious as you can get , '' said Deputy Scott Wilson of the Kitsap County Sheriff 's Department . Authorities first received a call Tuesday afternoon . When they arrived at the apartment in Port Orchard , Washington , they found the body of Amber Lynn Coplin , 30 . Around the same time , authorities started receiving tips about suspicious photographs posted online on social media sites Imgur and 4chan . `` The initial poster , believed to be Kalac , was also posting comments with the pictures . He said that the crime scene would be discovered and what he was going to do . We took this very seriously . We have no reason to believe that anyone posted them but him , '' the deputy said . According to CNN affiliate KOMO , the statement read , in part : `` Check the news for Port Orchard Washington in a few hours . Her son will be home from school soon . He 'll find her , then call the cops . I just wanted to share the pics before they find me . I bought a BB gun that looks realistic enough . When they come , I 'll pull it and it will be suicide by cop . I understand the doubts . Just check the ( expletive ) news . I have to lose my phone now . '' KOMO reported the same writer later added : `` Turns out its way harder to strangle someone to death than it looks on the movies . She fought so Damn hard . '' Kalac has a history of domestic violence and making threats to law enforcement , Wilson said . The victim 's missing vehicle was found abandoned in Portland earlier in the day . CNN 's Tony Marco , Tina Burnside , Dave Alsup and Amanda Watts contributed to this report .
All arrested near midnight . ' Michael Kalac , 24 , is accused of killing his girlfriend , Amber . ##e . ` ` Outside of a terrorist attack this is as serious as you can get , '' an official statement .