UPDATE: Kansas Man Convicted in Love Triangle Murder Sentenced

Corey Cook

An Oberlin, Kansas, man who shot and killed his lover's boyfriend back in 2011 – in what prosecutors have called a jealous rage – faced sentencing Monday.

Judge Preston Pratt Monday sentenced Dylan Coryell, 25, to more than 17 years in prison for the October, 2011, murder of 22-year-old U.S. Air Force airman Corey Cook. Coryell also received 13 months for aggravated battery. The sentences will be server concurrently.

A jury found Coryell guilty of intentional second–degree murder and aggravated battery in March.

One by one, Coryell's loved ones read statements to the courtroom Monday, painting the picture of a generous, kind and soft–hearted man – a stark contrast from the cold–blooded killer he's been made out to be.

"I'm a better person for having known him," Coryell's stepmother, Amy Dengler, said.

Prosecutors say Coryell barged into Cook's home on the night of Oct. 16, 2011, and shot him in the face while he slept next to his girlfriend of about one month, Sarah Campbell.

"Mr. Cook -- who was an airman himself, had received special ops training -- had absolutely no opportunity to defend himself or his girlfriend," Romine said.

Campbell testified during the trial that she was also having sex with Coryell, and described their relationship as "complicated."

"The tragic death of Mr. Cook was most likely the result of the jealous and angry feelings that Mr. Coryell had directed at Mr. Cook because of his relationship with Ms. Campbell," Kansas Assistant Attorney General Nicole Romine said.

The defense argued that Coryell has never committed a violent crime in his life, and asked the judge to consider granting him a downward durational departure, meaning that he would be given a less harsh sentence based on things like his prior criminal history and the severity of the crime.

"This is a good person that bad things happened to," Coryell's attorney, Justin Barrett, said.

The judge, however, rejected that request.

The defense declined an on–camera interview, but told NTV News, "While we're disappointed that the downward durational departure wasn't granted, the judge's decision and his result seemed well–reasoned."

"The Kansas Attorney General's Office believes the sentence imposed today was just and fair," Romine said, "and we're glad to have been able to assist the local law enforcement and prosecutors in obtaining justice for Corey Cook and his family."
Coryell was given credit for 610 days already served, and with good behavior, could be released in 15 years at the age of 40. Once released, he will have to register as a violent offender for another 15 years, and serve three years of post-release supervision.