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(NEWSER)– David Michael Kalac, 33, has been arrested and charged with second-degree murder outside Portland, Ore. His girlfriend, 30-year-old Amber Lynn Coplin, was found dead in her apartment near Seattle Tuesday, hours after someone claiming to be the killer anonymously posted graphic photos of her body to Imgur and 4chan, reports CNN.

Coplin, who reportedly lived with Kalac and her 13-year-old son, was found with the words "she killed me first" on her bedroom wall and blinds as well as the word "dead" on her bedside driver's license.

Photo: Portland Police Bureau

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