Nicolas Toledo, 76, of Highland Park, (left) and Jacki Sundheim, 63, of Highland Park, (right) were among seven victims killed in the mass shooting in downtown Highland Park Monday morning. | Provided Photos

A seventh victim has died after a mass shooting in Highland Park on the Fourth of July, authorities said. Some of the victims have been identified.

The seventh victim, who has not been publicly identified, died at Evanston Hospital on Tuesday, law enforcement told Lake and McHenry County Scanner.

The Cook County Medical Examiner’s Office is scheduling an autopsy on the man.

Robert E. Crimo III, 21, of Highwood, who was named as a person of interest in the Monday mass shooting, was arrested in Lake Forest around 6:30 p.m. Monday.

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

Robert E. Crimo III, 21, (inset) was taken into custody by police officers at Route 41 and Westleigh Road in Lake Forest following a police pursuit involving his silver Honda Fit sedan Monday evening. | Background Photo: Willie Gillespie (@wgweather)

Crimo allegedly brought a high-powered rifle to the Fourth of July parade in Highland Park.

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

Crimo then allegedly opened fire on parade-goers, killing seven people and injuring over 40 people. Over 70 rounds were fired from the rifle.

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

Crimo walked to his mother’s Highland Park home, which is nearby the parade route, and borrowed her silver 2010 Honda Fit, Covelli said.

Lake County Major Crime Task Force Spokesman Christopher Covelli provides updated information Tuesday during a press conference on the mass shooting in Highland Park that occurred Monday morning. | Photo: Willie Gillespie (@wgweather)

A person spotted the wanted Honda Fit as traveled southbound on Route 41 in North Chicago around 6:30 p.m. Monday as an intense manhunt was underway.

The person called 911 and a North Chicago police officer who was sitting at Route 41 and Buckley Road in North Chicago spotted Crimo drive past in the vehicle, Covelli and Highland Park Police Chief Lou Jogmen said.

A short pursuit ensued and it came to an end at Route 41 and Westleigh Road in Lake Forest.

Officers arrested Crimo and located a second rifle in his vehicle. The two rifles recovered were legally purchased by Crimo himself.

Covelli said there are no indications anyone else was involved.

Crimo remains held in custody as of Tuesday morning and has not been charged yet.

Investigators are continuing to work on the case by conducting interviews and reviewing videos, Covelli said.

Robert E. Crimo III, 21, (pictured) is taken into custody by police officers at Route 41 and Westleigh Road in Lake Forest following a police pursuit Monday evening. | Photo Submitted to Lake and McHenry County Scanner

Family and friends have identified Nicolas Toledo, 76, of Highland Park, and Jacki Sundheim, 63, of Highland Park, as two of the victims killed.

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Toledo was a grandfather of “many” and father of eight who attended the parade in what was supposed to be a “fun family day,” Xochil Toledo said, adding that it “turned into a horrific nightmare for us all.”

Sundheim was a lifelong resident of North Shore Congregation Israel and previously taught at Gates of Learning Preschool, according to North Shore Congregation Israel.

“Jacki’s work, kindness and warmth touched us all, from her early days teaching at the Gates of Learning Preschool to guiding innumerable among us through life’s moments of joy and sorrow as our Events and B’nei Mitzvah Coordinator– all of this with tireless dedication,” the congregation said in a statement.

“There are no words sufficient to express the depth of our grief for Jacki’s death and sympathy for her family and loved ones. We know you join us in the deepest prayer that Jacki’s soul will be bound up in the shelter of God’s wings and her family will somehow find comfort and consolation amidst this boundless grief,” the statement added.

Numerous fire departments respond Monday morning to the area of Second Street and Central Avenue in Highland Park following a shooting that left over two dozen people injured and seven people killed. | Photo: Woo-Sung Shim / Lake and McHenry County Scanner

Highland Park Police Department Commander Chris O’Neill said the shooting occurred around 10:14 a.m. Monday near Second Street and Central Avenue in Highland Park.

An Independence Day parade was in progress on the street when police officers, who were standing by at the event, heard gunfire, O’Neill said.

Police attempted to locate the source of the shooting and found numerous people shot.

A coordinated response with the fire department was initiated and a police perimeter was set up, O’Neill said.

Firearm evidence, including a rifle, was located on a rooftop of a business and secured, he said.

O’Neill said the shooting was a random act of violence.

Numerous police departments and SWAT teams respond Monday morning 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)

Covelli said initial indications show the suspect was “discreet” and hard to see on the roof of a business when he opened fire on the crowd using a high-powered rifle.

Numerous attendees who were attending the Fourth of July parade reported hearing gunfire and people began running for safety. Some people said the shots sounded like fireworks.

Some attendees said the gunman was on the roof of Uncle Dan’s Camping and Travel, 621 Central Avenue.

Five victims died at the scene and two other victims died at local hospitals, Covelli said, adding it is a “very sad day.”

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Numerous police departments and SWAT teams respond Monday to the area of Second Street and Central Avenue in Highland Park following a shooting that left over two dozen people injured and seven people killed. | Photo: Woo-Sung Shim / Lake and McHenry County Scanner

The Lake County Coroner’s Office is working to identify the deceased victims, whose ages were not immediately known.

The five who died at the scene were all adults, Lake County Coroner Jennifer Banek said. The age of the sixth and seventh victims who died at hospitals were not known.

Covelli said hospitals throughout Lake and Cook counties received patients from the incident, with conditions ranging from critical to serious.

Highland Park Fire Chief Joe Schrage said that six patients were transported to Northwestern Lake Forest Hospital and seven patients were transported to Evanston Hospital.

A spokesperson for NorthShore University HealthSystem said they received 39 patients at Evanston, Glenbrook, Highland Park and Skokie hospitals. Some of them arrived by ambulance and others were self-transported by car.

A spokesperson for Northwestern Medicine said that Lake Forest Hospital received nine victims from the incident. Six of the nine were gunshot victims.

Numerous police departments and SWAT teams respond Monday morning to the area of Second Street and Central Avenue in Highland Park following a shooting that left over two dozen people injured and seven people killed. | Photo: Max Weingardt

The total number of injured victims treated at hospitals is believed to be at least 48.

NorthShore University HealthSystem Dr. Brigham Temple said that Highland Park Hospital activated “code yellow,” which means mass casualty event, after receiving notification of the shooting Monday morning.

Within a short amount of time, numerous ambulances began showing up at the hospital with patients.

Nearly all of the victims at Highland Park Hospital sustained gunshot wounds.

Numerous police departments and SWAT teams respond Monday morning to the area of Second Street and Central Avenue in Highland Park following a shooting that left over two dozen people injured and seven people killed. | Photo: Woo-Sung Shim / Lake and McHenry County Scanner

Temple said at least four or five children treated at Highland Park Hospital sustained gunshot wounds.

One of the children was critically injured and underwent surgery. That child was then flown to Comer Children’s Hospital in Chicago.

There were a number of “heroic actions” by members of the community, police and paramedics who rushed in immediately following the shooting to provide aid to the injured, Covelli said.

Illinois Gov. JB Pritzker spoke during a press conference Monday evening where he began by crediting the actions of law enforcement who ran toward the gunshots. “[…] lives were saved because the Highland Park Police courageously protected and served their community.”

Governor JB Pritzker speaks Monday evening at Highland Park Fire Station 33 regarding the mass shooting that killed seven and injured dozens at the parade in Highland Park Monday morning. | Photo: Illinois Information Service

Pritzker vowed to residents of Highland Park that the suspect would be brought to justice.

He also said that he spoke with President Joe Biden who pledged all support the White House could provide. “The President agrees with me: This madness must stop,” Pritzker said.

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“There are no words for the kind of evil that shows up at a public celebration of freedom, hides on a roof and shoots innocent people with an assault rifle. There are no words I can offer to lessen the pain of those families who will no longer associate the 4th of July with celebration, but instead with grief,” Pritzker said.

“It is devastating that a celebration of America was ripped apart by our uniquely American plague. A day dedicated to freedom has put into stark relief the one freedom we as a nation refuse to uphold – the freedom of our fellow citizens to live without the daily fear of gun violence,” the governor said.

Lake County Board Chair Sandy Hart said she was “without words to respond to, yet again, another act of senseless violence, that this time has occurred right here in Lake County.”

Numerous police and fire departments respond Monday morning to the area of Second Street and Central Avenue in Highland Park following a shooting that left over two dozen people injured and seven people killed. | Photo: North Shore Updates

“My heart goes out to the victims and their loved ones, the Highland Park community, and its leadership, and to those who responded today and continue to do so, to this horrific event. Lake County and our partnering agencies stand with and beside you through it all to provide the support that is needed,” Hart said.

The Lake County Major Crime Task Force, Highland Park Police Department and FBI are leading the investigation into the incident.

Covelli said “hundreds” of law enforcement officers swarmed the area Monday as a manhunt began for the suspect.

Anyone with information on the shooting or those who have video are urged to contact the FBI tip line at 1-800-CALL-FBI, police officials said.

Congressman Brad Schneider said he and his campaign team were gathering at the start of the parade when the shooting started.

“My team and I are safe and secure,” Schneider said.

“We are monitoring the situation closely and in touch with the Mayor. Hearing of loss of life and others injured. My condolences to the family and loved ones; my prayers for the injured and for my community; and my commitment to do everything I can to make our children, our towns, our nation safer. Enough is enough!” he added.