The Action Cam was on the scene at a rooming house on the 2400 block of 77th Street.
Police say the two men got into an argument at about 4:15 a.m. Sunday morning in the basement of the building.
The suspect pulled a knife and stabbed the man three to four times in the chest and once in the arm, he also had a number of cuts on his face.
The victim was transported to Einstein Hospital, where he was placed in critical condition.
So far no arrests have been made.
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