Man allegedly posted photos of murdered girlfriend before turning self in for crime

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PORTLAND, Ore. (CNN) – Oregon authorities say they have arrested a man after he allegedly killed his girlfriend and posted gruesome pictures of her body online.

“Outside of a terrorist attack, this is as serious as you can get,” said Scott Wilson, with the Kitsap County Sheriff’s Department.

On Tuesday, police found the body of 30-year-old Amber Lynn Coplin.

According to KCPQ, detectives found various notes that were reportedly left by the killer. Police say a note with the word “dead” was found on Coplin’s driver’s license.

Also, they say the alleged killer wrote “she killed me first” and “bad news” on the walls.

Around the same time, authorities started receiving tips about photographs posted on social media sites like Imgur and 4chan.

Police believe 33-year-old David Michael Kalac originally posted the pictures online.

“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,” Wilson said.

According to KOMO, the comment 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.”

According to KOMO, the same writer added, “Turns out its way harder to strangle someone to death than it looks on the movies. She fought so Damn hard.”

Police spotted a vehicle that matched Coplin’s car and attempted to pull it over.

However, the driver sped away and led officers on a high-speed pursuit.

The car was found abandoned on Wednesday afternoon.

A short time later, David Michael Kalac surrendered to police on Wednesday and was arrested on second-degree murder and domestic violence.

According to Wilson, Kalac has a history of domestic violence and making threats to law enforcement.