Robert Crimo Jr., left, pleaded guilty to seven counts of misdemeanor reckless conduct. (E. Jason Wambsgans / Pool / Chicago Tribune / AP via CNN Newsource)

Prosecutors over the past few years have been slowly, but steadily, expanding the notion of who can be held accountable for a mass shooting.

Robert E. Crimo, III appears for a case management meeting before Judge Victoria A. Rossetti at the at the Lake County Courthouse Wednesday, Feb. 21, 2024 in Waukegan, Ill. (E. Jason Wambsgans / Chicago Tribune via AP, Pool)

Robert Crimo III had briefly been set to go to trial this week after he temporarily demanded to represent himself. But after he changed his mind, Judge Victoria Rossetti on Wednesday reset the initial Feb. 24, 2025 trial date.

Robert E. Crimo III, left, is escorted into a courtroom during a hearing before Judge Victoria A. Rossetti at the Lake County Courthouse, Waukegan, Ill., Wednesday, Jan. 10, 2024. (AP Photo / Nam Y. Huh, Pool)

The February trial date for alleged Highland Park parade gunman Robert Crimo III has been removed, with a new trial date coming either later this year or in early 2025.

A gun store display is pictured in a file photo. (WTTW News)

The U.S. Supreme Court on Monday denied to take up a petition filed by state Rep. Dan Caulkins, R-Decatur, that sought to overturn a ruling on a related case he’d brought before the Illinois Supreme Court.

A memorial to the victims of the July 4, 2022, shooting in Highland Park. (WTTW News)

In a surprise move Monday, Crimo III told the court he wishes to proceed pro se and will act as his own attorney. The 23-year-old also invoked his right to a speedy trial — pushing what had been expected to be a February 2025 trial date up to Feb. 26, 2024.

Robert E. Crimo Jr., arrives at the Lake County Courthouse, Wednesday, Nov. 15, 2023, in Waukegan, Ill. Crimo Jr. will serve 60 days in jail and two years of probation. (Nam Y. Huh / AP Photo)

Robert Crimo Jr. entered a guilty plea to seven misdemeanor counts of reckless conduct last week in Lake County court. Crimo sponsored his underage son’s firearm application three years before the July 2022 attack in Highland Park, even though the teenager had recently threatened violence.

Robert E. Crimo Jr. appears before Judge George D. Strickland at the Lake County Courthouse, Monday, Nov. 6, 2023, in Waukegan, Ill. (AP Photo  /Nam Y. Huh, Pool)

Just as proceedings were set to begin, Lake County State’s Attorney Eric Rinehart announced that Robert Crimo Jr. had agreed to plead guilty to seven Class A misdemeanor counts of reckless conduct, rather than the seven felony charges he had faced.

Attorney George Gomez, left, speaks to Judge George D. Strickland as Robert E. Crimo Jr., looks on during an appearance at the Lake County Courthouse, Monday, Aug. 7, 2023, in Waukegan, Ill. (AP Photo / Nam Y. Huh, Pool)

The bench trial of Robert Crimo Jr. is set to begin Monday in Lake County, more than 16 months after his son — Robert Crimo III — allegedly killed seven people and wounded dozens more during the Highland Park Fourth of July parade.

Attorney George Gomez, left, speaks to Judge George D. Strickland as Robert E. Crimo Jr., looks on during an appearance at the Lake County Courthouse, Monday, Aug. 7, 2023, in Waukegan, Ill. (AP Photo / Nam Y. Huh, Pool)

Attorneys for Robert Crimo Jr., who is set to go to trial next week on seven counts of reckless conduct, had sought to call his son — alleged parade shooter Robert Crimo III — to testify in his defense.

(WTTW News)

During a brief case management hearing Monday morning, Judge Victoria Rossetti said she intends to set a trial date for Robert Crimo III when he next appears in court Dec. 11.

Attorney George Gomez, left, speaks to Judge George D. Strickland as Robert E. Crimo Jr., looks on during an appearance at the Lake County Courthouse, Monday, Aug. 7, 2023, in Waukegan, Ill. (AP Photo / Nam Y. Huh, Pool)

Judge George Strickland on Monday denied multiple motions filed on behalf of Robert Crimo Jr., including one that sought to have his criminal charges tossed out based on a violation of the state’s statute of limitations.

Attorney George Gomez, left, speaks to Judge George D. Strickland as Robert E. Crimo Jr., looks on during an appearance at the Lake County Courthouse, Monday, Aug. 7, 2023, in Waukegan, Ill. (AP Phot o/ Nam Y. Huh, Pool)

The judge said at the hearing in Waukegan, north of Highland Park where the shooting occurred, that he would issue a ruling at the next hearing, on Aug. 28.

A memorial to the victims of the July 4, 2022, shooting in Highland Park. (WTTW News)

Judge George Strickland set a Nov. 6 trial date for Robert Crimo Jr. during a hearing Friday. Crimo Jr. faces seven counts of reckless conduct for allegedly helping his son, Robert Crimo III, obtain a firearm owner’s identification card (FOID) card.

A crowd retraces the Highland Park Fourth of July parade route on July 4, 2023, one year after a mass shooting in the suburb left seven dead. (Eunice Alpasan / WTTW News)

This July 4 in Highland Park, one year after seven people were killed and dozens more wounded in a mass shooting, the sounds of marching bands and cheers were replaced by a much more solemn gathering.

A gun store display is pictured in a file photo. (WTTW News)

Since the mass shooting at last year’s Fourth of July parade in Highland Park, Illinois has moved swiftly on gun control measures. The most controversial has been the ban on so-called assault weapons.

Highland Park Mayor Nancy Rotering on June 30, 2023. (WTTW News)

Highland Park Mayor Nancy Rotering was marching in last year’s Fourth of July parade when gun shots began to ring out. In the year since, she has seen the town come together in its time of need.