David Kalac
David Kalac, suspect of 4chan murder case arrested in WilsonvilleTwitter/@WilsonvillePD

David Michael Kalac, a Washington-based citizen found himself in police custody after posting his dead girlfriend's images online. The Oregon police and sheriff official has confirmed through a tweet.

Kalac was reportedly suspected of murdering his live-in partner Amber Lynn Coplin, aged 30. He is suspected to have killed Coplin in her Port Orchard apartment and later fled with her car. Authorities in Kitsap Country, Washington said he might have strangled her late on Monday or Tuesday.

The 33-year-old man was charged with second degree murder along with domestic violence after Coplin's body was found at her apartment on Tuesday afternoon.

The police found Coplin's driving licence next to her body with the word "dead" written next to her name. The pattern of writing explains somebody has written it in a hurried manner. The Police Officials also noticed a statement written "She killed me first" on the victim's apartment wall and "Bad News" on window blinds.

And before the police jumped into the victim's place a shocking post by an anonymous user found in the online forum 4Chan showed photographs of the same woman's naked corpse with a message - "Turns out it's way harder to strangle someone to death than it looks in the movies."

The user also commented later to check the news for Port Orchard, Washington, while remaining behind the musk.

"Her son will be home from school soon. He'll find her and then call the cops. I just wanted to share the pics before they find me," the user added.

Police doubts this anonymous user and David Kalac is the same person who strangled her first and then took her photographs and posted them online.

The investigator claimed her thirteen-year-old son found her body first and called his father thereafter.

The investigator doubted Kalac after finding his clothes, cellphone and laptop in the victim's apartment. They also didn't find Coplin's car there hence started to search for him.

The victim's car, a 2001 model Ford Focus was found 257kms away from the victim's place. Police claim it was Kalac who drove the car after murdering her.

Wilson Police said at the time of arrest the convicted person behaved in a cooperative manner. According to Coplin's neighbour they used to have violent arguments before.

Significantly, 4chan is the same forum where several nude celebrity images were leaked in August.