A Chicago man is facing involuntary manslaughter charges after an altercation at a downtown CTA station last month led to the death of a 9-year-old Humboldt Park boy with autism who fell down stairs during the melee, authorities said Monday.

Police arrested Michael J. Korosa, 52, on Saturday, the same day the boy, Elijah Ramon Flores, was laid to rest during a funeral mass at Holy Name Cathedral.

During a detention hearing Monday, Cook County Judge Susana Ortiz released Korosa pending his next court appearance, according to court records. Besides manslaughter, Korosa also is charged with aggravated battery of a transit employee — both felonies, the records said.

Surveillance video captured Flores and a 22-year-old man exiting a Green Line train on the 500 block of West Lake Street shor

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