Nicholas Ayala, 17, and Anthony Malcolm, 18 were arrested Sunday and charged with first-degree murder and robbery in the attack of Delfino Mora, the Chicago Tribune reported.
Malik Jones, 16, was arrested Saturday for the attack and charged with first-degree murder.
Prosecutors said the three teens confronted Mora, who was disabled, in an alley around 5 a.m. Tuesday, asking him what he had in his pockets. Jones then punched the victim, who fell to the ground and hit his head on the concrete, prosecutors said.
Ayala and Malcolm took turns using a cell phone camera to record the beating, authorities said.
Mora was found about three hours after the attack by a passerby and rushed to the hospital where he died Wednesday, officials said.
The video of the attack was uploaded to Jones' Facebook account, prosecutors said, and was passed on until it reached a co-worker of one of Mora's son, who identified his father in the video to police.
Jones, who was charged as an adult, was ordered held without bail Sunday. Ayala and Malcolm were expected to appear in court Monday.