Floyd E. Brown, 41, of Springfield. | Photo: Illinois Department of Corrections.

The man charged with shooting and killing McHenry County sheriff’s deputy Jacob Keltner, who worked on a U.S. Marshals task force, is now facing additional federal charges, prosecutors said.

A federal grand jury returned a superseding indictment on Tuesday for Floyd E. Brown, 41, of Springfield, who was originally charged with one count of killing a federal law enforcement officer and two counts of illegal firearm possession.

The U.S. Attorney’s Office Northern District of Illinois said that the jury added several new charges against Brown in connection with the killing of Keltner and other acts committed by Brown on the day of the murder.

He faces the following new charges:

  • one count of attempting to kill a Deputy Marshal and two Special Deputy Marshals
  • one count of using a deadly and dangerous weapon to forcibly assault Special Deputy Keltner
  • one count of using a deadly and dangerous weapon to forcibly assault a Deputy Marshal and two Special Deputy Marshals
  • one count of discharging a firearm during a crime of violence, causing the death of Special Deputy Keltner
  • one count of discharging a firearm during the assault and attempted murder of the Deputy Marshal and two Special Deputy Marshals
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An arraignment date in federal court in Rockford has not yet been scheduled.

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 fatally shot on March 7, 2019. | Photo by Alex Vucha.

Keltner was working as a Special Deputy for the U.S. Marshal Service Great Lakes Regional Fugitive Task Force on March 7, 2019.

The task force was attempting to serve an arrest warrant on Brown, who was staying at the Extended Stay America Hotel in Rockford.

When police knocked on the hotel room door where Brown was staying, he opened fire on the officers with a high-powered rifle.

Keltner, along with Brown’s girlfriend, who was in the hotel room with him, both sustained gunshot wounds. Keltner was later pronounced dead at a hospital while the woman sustained non-life-threatening injuries.

A United States flag is draped over the casket of McHenry County Sheriff’s Deputy Jacob Keltner outside of Woodstock North High School on March 13, 2019. | Photo by Rich Chapman.

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 Interstate 55 at speeds of over 100 mph until he came to a stop near Lincoln, Illinois after he ran over spike strips.

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

Several agencies assisted in the investigation, including the U.S. Bureau of Alcohol, Tobacco, Firearms, and Explosives, Rockford Police Department, Winnebago County Sheriff’s Office, Bloomington Police Department, Lincoln Police Department, Logan County Sheriff’s Office and Illinois State Police.