Robert E. Crimo III, 22, flashes a peace sign as he leaves his second hearing in Lake County court in Waukegan on Tuesday. | Photo: Nam Y. Huh/AP Photo (Pool)

Accused Highland Park parade shooter Robert Crimo III flashed a peace sign as he left his court hearing Tuesday where attorneys said they are reviewing thousands of documents in the case.

Crimo, 22, of Highwood, is charged with 21 counts of first-degree murder — three counts for each victim.

Crimo is additionally charged with 48 counts of attempted murder and 48 counts of aggravated battery with a firearm for each victim who was struck by a bullet, bullet fragment or shrapnel, according to the Lake County State’s Attorney’s Office.

He appeared in court late Tuesday morning for a case management conference, which was his second time appearing in court since his arrest.

Judge Victoria A. Rossetti listens during the second hearing of Robert E. Crimo III in Lake County court in Waukegan on Tuesday. | Photo: Nam Y. Huh/AP Photo (Pool)

The hearing was a pre-trial status hearing and took place in front of Lake County Judge Victoria Rossetti.

The Lake County Public Defender’s Office is representing Crimo. Assistant public defenders Gregory Ticsay and Anton Trizna were alongside Crimo in court.

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Lake County Assistant State’s Attorney Ben Dillon, who is the chief of the Violent Crimes Unit, said his office has turned over more than 2,500 pages of material to the defense.

More material is expected to be turned over to the defense soon as part of the continued discovery process.

Rossetti set the next court hearing for January 31 for another case management conference after Trizna said it would take time to review the material due to the volume of the documents.

A trial has not been scheduled yet.

Numerous police departments and SWAT teams respond on July 4, 2022, to the area of Second Street and Central Avenue in Highland Park following a shooting that left over two dozen people injured and seven killed. | Photo: Willie Gillespie (@wgweather)

Crimo, who was handcuffed, flashed what appeared to be a peace sign as he stood up to leave at the end of the hearing.

In late July, prosecutors presented their case to a Lake County grand jury and the jury returned the 117-count indictment. Crimo has pleaded not guilty to all of the charges.

Lake County State’s Attorney Eric Rinehart previously said that the first-degree murder charges will lead to a mandatory life sentence should Crimo be convicted.

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In July, during a bond hearing, Dillon said that the ATF conducted an e-trace of the rifle used in the shooting to track it to Crimo.

Robert E. Crimo III, 22, (pictured) is taken into custody by police officers at Route 41 and Westleigh Road in Lake Forest following a police pursuit on July 4, 2022. | Photo Submitted to Lake and McHenry County Scanner

Law enforcement officers familiar with Crimo identified him after reviewing surveillance video.

Crimo confessed to the shooting during an interview at the Highland Park Police Department and admitted to dressing up as a woman to disguise himself, Dillon said.

Lake County Major Crime Task Force Spokesman Christopher Covelli said that Crimo pre-planned the attack for several weeks.

Covelli said that Crimo used a fire escape ladder to access the roof of a building on the parade route.

Crimo admitted to “looking down his sights” of his Smith & Wesson M&P 15 semi-automatic rifle before opening fire on the crowd on July 4 near Second Street and Central Avenue in Highland Park.

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Crimo said he fired two full 30-round magazines before loading a third 30-round magazine and firing, Dillon said.

Robert E. Crimo III, 22, of Highwood | Provided Photos

Seven people were killed and dozens of others were shot. 83 spent shell casings were recovered at the scene.

The seven slain victims include Katherine Goldstein, 64, of Highland Park; Irina McCarthy, 35, of Highland Park; Kevin McCarthy, 37, of Highland Park; Jacquelyn Sundheim, 63, of Highland Park; Stephen Straus, 88, of Highland Park; and Nicolas Toledo-Zaragoza, 78, of Morelos, Mexico; and Eduardo Uvaldo, 69, of Waukegan.

Crimo, who was dressed as a woman, exited the roof, dropped the rifle and escaped with the fleeing crowd, according to Covelli.

Crimo identified himself on surveillance video and the weapon used, Dillon said.

Crimo remains held in the Lake County Jail without the possibility of being released on bond after a judge approved prosecutors’ request to detain him.