The Los Pollos truck attacks
One thing I happen to like about Better Call Saul is the scenes that provide explanations for things that didn't make sense in Breaking Bad.
One example were the two cartel attacks on Gus's trucks in season 4. I initially wondered, how come there were no police investigations? Both ambushes ended in a shot up Los Pollos Hermanos refrigerator truck on the roadside and three bodies (the driver and the two attackers in the one that Mike foiled; the driver and two redshirt guards armed with assault rifles in the second, successful attempt), and it looks like the bodies and truck were just left there, not disposed of, meaning a police investigation would happen if someone came upon it.
It takes a little logic, but remember Mike's frustration in the season 3 finale with Walt for killing the two dealers in public? Well, that pretty much means Gus has the resources to clean up messes fairly quickly. The trucks may have GPS trackers on them and some way of signaling that something's gone wrong (perhaps the driver is told, "If your truck is ambushed, press this button and it will automatically radio a distress signal"; that's not far from reality because shipping companies like FedEx and UPS do use such devices on their own trucks). Gus may even be providing his trucks with escort cars that fall back when the truck is ambushed, wait until the gunfire subsides, then once the coast is clear, move in and clean up the truck before the police can show up.
That idea is more or less confirmed by Better Call Saul, after Mike attacks the ice cream truck Hector's money-runner drives. When Nacho meets with Mike to ask about what happened, Mike asks why the stunt never made the papers. Nacho is angered realizing that Mike was trying to put the cops on Hector's trail, and mentions that Hector's crew, alerted by the driver, cleaned up the scene so that officially it never happened. Hector's operation may be small fry compared to Gus's operation, but if Hector could disappear an attacked truck like that, Gus certainly could.