The shooting happened around 12:53 a.m. in the 8100-block of Champlain Avenue in the Chatham neighborhood.
A 50-year-old man was trying to break into the house when he was shot by the homeowner, who is a concealed-carry license holder.
The suspect was taken to the hospital in critical condition was a gunshot wound to the back.
Chicago police area detectives are investigating.
This comes after a CCL holder shot three men outside a Belmont Cragin home on Friday night.
The 43-year-old man was arguing with three men who he knew when police said the men attacked him.
According to police, the victim pulled out a handgun and fired it, striking all three alleged attackers. The homeowner is a concealed-to-carry license holder.
READ MORE | CCL holder shoots 3 men while being attacked outside Belmont Cragin home, Chicago police say
No information has been released by police about any possible criminal charges in any of the cases.
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