Take your pick since it's nearly any active street gang/mob. Back around 06 in Chicago, TVL & Breeds warring which resulted in many victims. During the back n forth shootings the police intercepted 2 New Breeda going on a hit and they died by gunning at the police. Leaders were giving orders in that conflict. There's plenty of numerous stories.
I'm not saying it hasn't happened before but it's not normal within U.S street gangs to do that. They usually just get arrested and some snitch and some not. Also U.S gangs don't have a structure like the cartels, most U.S gangs are just crews with no structure and the leader of the crew but that's about it. All I am saying it's not a common occurrence for street gangs to shootout it out with the police to defend their boss. In Mexico it's very common for the cartel soldiers to block highways, streets, and lay spikes to puncture the tires of the Mexican soldiers vehicles when they are about to capture someone captain or boss especially. It's an exception not a rule for U.S street gangs to shoot it out with the police to defend their boss. It very rarely happens.
