The person of interest in a mass shooting at an Independence Day parade in Illinois obtained his weapon legally, according to the mayor of Highland Park.

Officers guard the scene of the Fourth of July parade shooting in Highland Park, Illinois.

The scene of the Fourth of July parade shooting is guarded by officers. The photo was taken by Young Rae Kim.

AFP via Getty Images

Shortly after he was identified as a person of interest in the Highland Park shooting, he was taken into custody near Lake Forest.

Police spotted a Honda Fit that was wanted by the FBI in North Chicago and attempted a traffic stop before the driver led officers on a short pursuit that ended peacefully.

During a press conference on Monday, Sgt. Christopher Covelli of the Lake County Major Crime Task Force said that the investigation would continue.

According to NBC News, the rapper known as Awake depicted violent imagery of mass murders in his music videos.

Rotering said that the posts reflected a plan and desire to commit carnage for a long time in advance.

Rotering said her office is waiting for authorities to file charges against someone.

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Police said the shooter was perched on a rooftop and began firing with a high-powered rifle into a crowd gathered to watch the Fourth of July celebrations. When police spotted a person who could have been the shooter on a rooftop, they began a search that ended with the person running away. Nicolas Toledo, a 78-year-old grandfather who didn't want to attend the parade, was one of the six people killed. Almost 40 other people were injured, ranging in age from 8 to 85, according to Dr. Temple, the medical director of emergency preparedness.

Surprising Fact

Rotering was a Cub Scout leader when she served as a leader, and she said she didn't think he was known to police before the shooting. He was a little boy. You step back and ask what happened. How did someone get angry and hate?

Crucial Quote

It is unbelievable to me that this is an acceptable part of who we are as a nation.

The mayor spoke after the July Fourth parade shooting.

The US mass shooting is close to a record breaking level.