The "three men in their early 20s" had no identifying characteristics, to assist police in apprehending them?
They got a good enough look to discern they were in their EARLY 20s, versus teens or late 20s.
Are they Polish? Italian? Irish? Swedish?
Since Chicago PD solve less than 20% of murders, perhaps they need help. Perhaps releasing the description of the suspects, would aid CPD.
Logical thought, intellectual curiosity, honest have left the media.