[Tenacious 1]

I don’t understand. I thought gangs shot each other. Where is it suggested that cops executed people? What was the set up?

[USNBandit]

Look at the sourcing. There is no evidence presented, only speculation.

[ChicagahAl]

Where is it suggested that cops executed people?

The caliber of the bullets recovered during the autopsies. If they were 5.56/.223 instead of pistol/revolver caliber slugs, then the shots were most likely fired by the LEO's/Feds.