Williams was the subject of a statewide manhunt in ME after the murder of Somerset County Deputy Corporal Eugene Cole on Wednesday.
Authorities in ME say they have arrested a man accused of killing an police officer before stealing his cruiser and robbing a convenience store earlier this week.
"We will now deal with the necessary job of respectfully laying our fallen brother to relaxation".
The Department of Corrections confirmed that 29-year-old John Williams is detained at the Maine State Prison in Warren.
Williams was wanted in the fatal shooting of Corporal Eugene Cole early Wednesday after the two had an encounter on a darkened road in Norridgewock.
According to the Essex County District Attorney's Office, Williams was due to appear in Haverhill District Court Wednesday to answer to charges of improper storage of an unlicensed firearm and possession of a large capacity firearm (9 mm Smith & Wesson with a 16-round magazine), in addition to automobile-related charges. The Maine Department of Corrections Commissioner, Joseph Fitzpatrick, said Williams is being held in a "high custody" cell.
Maine State Police posted a photo of Williams on social media showing him shortly after his arrest, shirtless and with his head pulled back in order to face the camera. A $20,000 reward had been offered for information leading to his capture, the Federal Bureau of Investigation said.
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His capture ends a nationwide manhunt for the suspected killer of Cole, the 25th officer to be gunned down in the line of duty this year.
The community of 3,500 had been nervous since scores of police officers poured into the region during the manhunt.
After allegedly shooting and killing Cpl.
The officer said Williams was in a camp then came out while a search team was on the perimeter.
Lancaster says that the Cole family was his first call after finding Williams. It wasn't clear if Williams had any connection to that camp.
Before the arrest, the wife of the slain deputy had implored his killer to turn himself in, or at least reach out to police. "Mr. Williams, be assured you'll be treated the same way Corporal Cole would have treated you if you had given him the opportunity, with dignity and respect".
The arrest brings to an finish a prolonged manhunt to search out the suspect after he fled into the wilderness, Â in accordance with Norridgewock police.