Updated: March 7, 2019, 9:30 p.m.

A criminal complaint alleges Floyd E. Brown shot a task force officer in the head Thursday morning after he escaped through the window of a Extended Stay America hotel room.

According to the criminal complaint, Keltner was outside the hotel while task force officers were executing the warrant. Brown allegedly escaped through the window of a third-floor room, then shot at him as he was leaving the scene.

The criminal complaint was filed by a special agent with the Federal Bureau of Investigation. For more details on the criminal complaint,

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Updated: March 7, 2019, 6:30 p.m.

The McHenry County Sheriff's Department calls Thursday's incident "bitter news" after the death of one of its own.

In a Facebook post, the department wrote Keltner was integral to the office and "had risen quickly to greater responsibilities after he was first sworn in 2006. He was loved and respected by all his colleagues, and he will be sorely missed."

Keltner had served the McHenry community for nearly 13 years, according to the McHenry County's Sheriff's Office. The department says he shot Thursday morning while serving a warrant.

Floyd E. Brown, accused for the death of Keltner, has been charged with first-degree murder.

Brown was taken into custody around 5 p.m. after an hours-long standoff on I-55 near Lincoln, according to Illinois State Police.

Maggie Schneider, A spokesperson for the U.S. District's Attorney's Office, says the death penalty is a possibility.

Rockford Police and the Winnebago County State's Attorney provided another update around 6 p.m. Thursday:

WATCH: Rockford Police update after the death of McHenry County Deputy Jacob Keltner, who was shot Thursday while serving a warrant. Posted by WIFR TV on Thursday, March 7, 2019

SHERIFF PRIM STATEMENT REGARDING LINE-OF-DUTY DEATH; DEPUTY SHERIFF JACOB KELTNER E.O.W. MARCH 7, 2019 ​It is with... Posted by McHenry County Sheriff's Office on Thursday, March 7, 2019

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Updated: March 7, 2019, 4 p.m.

A McHenry County Sheriff’s deputy working with U.S. Marshals has died, according to the McHenry County Sheriff’s Office.

Jacob Keltner was identified as the officer who died. The McHenry County Sheriff’s Office learned he had died shortly after 3:30 p.m.

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Updated: March 7, 2019, 3:45 p.m.

Rockford police have not confirmed whether the deputy shot Thursday morning has died, according to a tweet.

Winnebago County Coroner Bill Hintz has also told 23 News that he has not been called to any local hospital and has not learned about any deaths related to the shooting.

Police say a McHenry County Deputy, working with U.S. Marshals, was shot Thursday morning while serving a warrant.

Rockford Police said the officer was in critical condition during a news briefing around 1:15 p.m. The officer's condition had not changed as of 3:30 p.m., according to a

​ from Rockford Police.

Police say a woman, an acquaintance of the suspect was also shot. She was released from a hospital after being treated for minor injuries.

We will update on the officer's condition once we get it confirmed by the McHenry County Sheriff's Office, Rockford Police, Winnebago County Coroner or Winnebago County Sheriff's Department.

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Updated: March 7, 2019, 1:15 p.m.

Police say a deputy working with U.S. Marshals is in critical condition after being shot Thursday morning.

The officer shot was a McHenry County Deputy working with U.S. Marshals. Authorities have chosen to withhold the name of the U.S. Marshal shot.

The suspect, Floyd E. Brown, has been contained, but he is not in custody. He is charged with attempted murder.

Brown's vehicle was located between Bloomington and Springfield. Police say he crashed on the interstate as officers were trying to stop him.

Rockford Police Lt. Kurt Whisenand says a female acquaintance was in the hotel with the suspect. She was also shot, but her injuries are non-life-threatening.

Whisenand says there were no shots fired by officers.

Watch the latest press briefing below:

WATCH LIVE: Rockford Police update after a U.S. Marshal was shot Thursday morning in Rockford. Posted by WIFR TV on Thursday, March 7, 2019

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Updated: March 7, 2019, 12:30 p.m.

llinois State Police say they have stopped a suspect, believed to be Floyd Brown, on Interstate 55 in Logan County.

The suspect is currently sitting stationary inside a vehicle at MP 133.

According to multiple sources, Brown was in an active chase on I-55.

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Updated: March 7, 2019, 10:45 a.m.

One U.S. Marshal was shot, but his exact condition is unknown, according to Rockford Police.

The suspect was identified Floyd E. Brown, 39, of Springfield. He was believed to be driving a light blue or silver Grand Marquis car with an Illinois license plate number of BFI3112, according to police.

Police say Brown was wanted for an outstanding warrant. He is at large, and believed to be armed and dangerous. Officers say he used a rifle in the shooting.

Officers believe the suspect is no longer in the Rockford area.

UPDATE: Police originally told 23 News the suspect was 45, but later confirmed his age was 39.

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Published: March 7, 2019, 9:55 a.m.

Police are responding to an "active shooter situation" near Extended Stay America on North Bell School Road.

Drivers are asked to avoid Bell School Road.

We will update as more information becomes available.

ACTIVE SHOOTING: Police are on scene of an active shooting on Bell School Road. Posted by WIFR TV on Thursday, March 7, 2019