Chris Pettry, A Chicago Bears fan who had traveled down to Florida to see his team play the Jaguars in Jacksonville on Sunday afternoon was stabbed to death inside a restaurant early Sunday morning.

Pettry, 42, of Lake Villa, Ill., was stabbed at Fionn MacCool's, an Irish restaurant and bar, at the Jacksonville Landing area, according to a news release from the Jacksonville Sheriff's Office.

According to the release, the investigation revealed Pettry was in town for the game and "was involved in a disturbance with two other subjects inside of the restaurant. During the incident, Mr. Pettry was stabbed by one of the subjects and was later pronounced deceased."

As details of the incident emerge, Fox News in Chicago reports that Pettry’s killing was a result of a jealous rage by the suspect Matthew Reid Hinson.

According to Jacksonville sheriff's investigators, Pettry had been talking to Hinson's wife at the bar moments before he was killed.

Jacksonville homicide detectives were called to Fionn MacCool's restaurant regarding a stabbing at 1:40 a.m. Sunday, in the entertainment district known as "Jacksonville Landing." A phone number listed for the Irish restaurant and pub was temporarily disconnected Sunday.

"Independent eyewitnesses gave detailed accounts of the incident," according to a statement posted on the sheriff's office website early Monday. "Each described how the suspect cut the victim and calmly walked out of the establishment."

"For some reason, he became jealous, enraged, whatever you want to call it, and approached our victim," Jacksonville Sheriff's Lt. Rob Schoonover told reporters. "According to one of the eyewitnesses, he calmly and basically cold-blooded just cut the victim's throat, and calmly walked out of the restaurant."

Police said the Hinson has confessed to the crime after being arrested in his truck shortly after the murder.

They found a small pocket knife believed to be the murder weapon. "During a subsequent interview post Miranda, Hinson gives admissions to stabbing the victim but also alleged he does not remember his reasons for doing so," according to a police report obtained by Fox News in Chicago.

Police added that the slaying had nothing to do with Pettry being a Bears fan or any kind of football rivalry.

Bears coach Lovie Smith spoke briefly about Pettry during his Monday press conference.

"Our prayers definitely go out to his family," Smith said.