PORTLAND (NEWS CENTER Maine) - Suspected deputy killer John Williams was "mad at Corporal Eugene Cole for arresting his girlfriend" but didn't have a "vendetta" against the deputy, according to a police affidavit unsealed Monday.

Corporal Cole was one of the arresting officers in the April 21st arrest of Williams' girlfriend, Kristina Pomerleau, for drug possession. Williams is charged with Corporal Cole's murder.

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A nationwide manhunt began Wednesday morning for a suspected police officer killer John Daniel Williams.

The affidavit, made public Monday, reveals details of what police say happened the night John Williams allegedly shot and killed Somerset County Sheriff's Deputy Corporal Eugene Cole, leading to a massive, statewide manhunt that ultimately ended in Williams' arrest.

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According to the affidavit, John Williams was trying to get into his stepmother's home in Norridgewock when Corporal Cole interrupted him. The home, located a 16 Mercer Road, is where Cole's body was found approximately six hours later.

Corporal Cole approached Williams and asked him for his name, according to John Williams' interview with police. When Williams told Cole who he was, he claims the deputy responded, "I thought so."

Williams claimed Corporal Cole then tried to arrest him for an unknown reason, the affidavit said.

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John Williams then pulled his 9mm handgun from his waist and began to approach the sheriff's deputy, according to the affidavit. Corporal Cole backed up, tripped, and fell to the ground.

As Corporal Cole lay on the ground with his hands covering his face, John Williams shot him in the head, according to the court documents. Corporal Cole's cause of death was "a perforating gunshot wound of the neck with perforation of the cervical spinal cord," records show.

John Williams told police he "eliminated" Corporal Cole, according to the affidavit.

John Williams arraignment

A Ruger 9mm handgun was later found at the cabin where John Williams was arrested four days after Corporal Cole's death.

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Corporal Eugene Cole was shot and killed in Norridgewock on Wednesday morning between the hours of 1 and 2 a.m.

John Williams told police that he just "wasn't ready to go to jail," documents show.

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After the alleged murder, police say John Williams stole Cole's cruiser, stole from a Cumberland Farms, and called multiple friends to tell them what he had done. One friend told police John Williams said, "I screwed up big time" in a phone conversation after the alleged crime.

Williams later ditched the cruiser in a friend's backyard and ran away. He was arrested four days later in a wooded area behind a camp.

He pleaded 'not guilty' to the crime.