HIGHLAND PARK, Illinois – A man taken into custody in connection with a deadly attack on a Chicago-area July Fourth celebration that killed six people appears to be an aspiring rapper who posted videos depicting disturbing acts of violence.

Authorities spent frantic hours Monday searching for Robert “Bobby” E. Crimo III and took him into custody shortly before 7 p.m. local time following a short pursuit about five miles away from the shooting. No charges were announced.

Authorities initially said Crimo was 22, but an FBI bulletin and Crimo’s social media said he was 21.

A North Chicago police officer spotted and briefly chased Crimo in nearby Lake Forest and “the subject was taken into custody without incident,” Highland Park police Chief Lou Jogmen said. “This doesn’t necessarily mean this is over but we are certainly encouraged that we have a person of interest.”

Television news video showed a silver Honda Fit – which authorities said Crimo was driving – stopped at an intersection, doors open. Police had said Crimo was likely armed and dangerous

“This individual is believed to have been responsible for what happened,” said Lake County Major Crime Task Force spokesman Christopher Covelli in announcing Crimo’s arrest. Covelli said a “significant amount of digital evidence” helped lead investigators to Crimo.

‘I grabbed my kid and ran’:6 dead in shooting at July 4th parade in Chicago suburb

WHAT IS HIGHLAND PARK:Affluent Chicago suburb known for films, family community

Who is Robert Crimo? 

Authorities say the shooter fired from a rooftop into the crowd around 10 a.m. and that they recovered a rifle from the scene. They initially stopped short of calling Crimo a suspect, describing him instead as a “person of interest,” but said the FBI was offering a reward for information.

A Chicago-based rapper of the same name and fitting the description given by police, including facial tattoos, performs under the name “Awake the Rapper” and has previously posted on YouTube and other platforms multiple videos of violent images, including a man with a rifle shooting people.

Another video he posted showed a cartoon character carrying a rifle later laying facedown in a pool of blood, surrounded by police officers. That same artist appeared to have posted a picture of a newspaper clipping on his bedroom wall referencing the death of Lee Harvey Oswald, who assassinated President John F. Kennedy with a rifle from an elevated location.

A two-story home listed as Crimo’s address was surrounded by law enforcement vehicles Monday evening. Several police cars and at least one armored vehicle were stationed outside, and journalists were being kept well away from the area. Neighbors said Crimo’s father, Bob Crimo, owned the nearby restaurant Bob’s Pantry & Deli.