The 9-year-old boy with autism who was critically injured when he fell down the stairs at a CTA Green Line station during a fight on the steps has been declared brain dead.

Family identified him as Elijah Flores. They were too upset to speak on camera, but spoke with CBS News Chicago over the phone Monday.

Flores was with a 22-year-old family friend at the Clinton L Stop in the West Loop on Sunday, Aug. 10, when Chicago police said two men got into a fight with the family friend. The 22-year-old was hit in the back of the head and fell down the stairs; Flores fell as well. He hit his head in the fall and was taken to Lurie Children's Hospital in critical condition. His family said the fall caused life-threatening brain trauma.

Now, over a week later, the 9-year-old who loved singing and dancing, Michael Jackson, and going to school, has been declared brain dead.

His parents said his favorite place was Lake Michigan and that he loved superheroes. They said he will now be a superhero to other children as an organ donor.

The two men who started the fight ran away and police are still looking for him.

Police and the Cook County State's Attorney's office are not saying how charges could change once suspects are apprehended based on the latest developments. But CBS News Chicago looked at crimes on Chicago Transit Authority property — finding higher total crime numbers than any year to date in the past 10 with the exception of 2022.

Aggravated battery and aggravated assault numbers are the highest for this year to date since 2015.

Flores' family is now raising money on GoFundMe to pay for his medical expenses and funeral plans. They said they are in direct contact with Chicago police and hope to find the men behind their son's death.

CBS News Chicago checked with the CTA, which released this statement: "The CTA extends its deepest condolences to the family of Elijah Ramon Flores. We continue to provide our full and complete support to the Chicago Police Department as they investigate this matter."

Photos of the people involved have not been made publicly available.