McHenry County Sheriff Bill Prim talks with sheriff’s deputies outside of the Extended Stay Hotel, 747 North Bell School Road in Rockford, after a McHenry County Sheriff’s deputy was shot | Photo by Alex Vucha.

McHenry County Sheriff’s Deputy Jacob Keltner, who worked as a fugitive investigator on the local U.S. Marshals task force, has died after being shot while serving a warrant at a Rockford hotel Thursday morning, the sheriff’s office confirmed.

Rockford Police Department Lt. Andre Brass said that police responded at 9:15 a.m. Thursday to the Extended Stay America Hotel, 747 North Bell School Road in Rockford.

The U.S. Marshals fugitive task force was attempting to serve an arrest warrant on 39-year-old Floyd E. Brown, who was staying in one of the rooms at the hotel, when he shot a U.S. Marshal, Brass said.

A female acquaintance of Brown, who was in the room at the time, was shot by Brown as well. She sustained non-life-threatening injuries and is being treated at a local hospital.

39-year-old Floyd E. Brown | Photo: Illinois Department of Corrections

Brown fled the scene in a Mercury Grand Marquis after jumping out his hotel room window. Illinois State Police and other police agencies chased Brown on southbound Interstate 55 at speeds of over 100 mph until he came to a stop near Lincoln, Illinois when he ran over spike strips.

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The McHenry County Sheriff’s Office confirmed at 3:54 p.m. Thursday afternoon that McHenry County Sheriff’s Deputy Jacob Keltner had died at 3:30 p.m. Keltner was working for the U.S. Marshal Service Great Lakes Regional Fugitive Task Force.

Keltner had almost 13 years of service, the McHenry County Sheriff’s Office said.

As of 3 p.m. Thursday, SWAT teams and numerous police officers remain in a standoff with Brown, who is reportedly armed with a high-powered rifle.

This is a developing story. Check back later for updates.