A 52-year-old Chicago man is charged in the death of a 9-year-old boy with autism who died after falling down the stairs at a CTA Green Line station.

Police said Elijah Flores was with a 22-year-old family friend at the Clinton L stop in the West Loop on Aug. 10 when two men got into a fight with the family friend. According to CPD, the 22-year-old was hit in the back of the head and fell down the stairs, and Flores fell as well. Flores struck his head in the fall and was taken to Lurie Children's Hospital in critical condition.

A little over a week later he was declared brain dead. He became an organ donor and died a day later.

Authorities have charged Michael Korosa of Chicago in connection with Flores' death. He is charged with one felony count of involuntary manslaughter and one felony count of aggravated battery of a transit employee. 

Chicago police initially said Korosa was charged with murder, but later updated their statement with the correct charges. 

According to prosecutors, the 22-year-old and Flores were getting off the train when the 22-year-old passed Korosa and a friend, and took money out of the friend's hand before trying to run away. Korosa and his friend got off the train to chase him, and prosecutors said the 22-year-old picked up Flores and put him over his shoulder as he went to run down the stairs at the Clinton L stop. 

Prosecutors say as they were trying to escape down the stairs, Korosa hit the 22-year-old on the back and head with his cane. The 22-year-old and Flores both fell, and Flores struck his head in the fall. 

Prosecutors say Korosa and his friend then ran down the stairs as the 22-year-old stood up, leaving Flores on the ground, and demanded the friend's money back. The 22-year-old threw it down the stairs and as the two of them chased down the cash, the 22-year-old picked up Flores and took him back up to the train, prosecutors said.

A bystander had started to film the incident and prosecutors say the 22-year-old friend of the Flores family told them not to call anyone, then boarded the next L train. While on the train, Flores stopped moving and another passenger called 911. Prosecutors said the 22-year-old did not go to the hospital with Flores, who died days later. 

Prosecutors said the incident was captured on video by CTA surveillance cameras and by the bystander. 

Chicago police said Korosa was taken into custody Saturday and appeared in court for a detention hearing Monday and was released on electronic monitoring.