> don't cops have lawyers who can inform them about what is a smart move vs not?

Generally, municipalities have at least some sort of attorney on retainer for this sort of thing.

Generally. I don't know if that's the case where he lives.

Either way, the police have to be smart enough to listen to that attorney, and have to be given a consequence for not doing so. If you can brush off everything as qualified immunity and say you were acting under color of law while a part of a union that would raise absolute hell for any sort of corrective action taken against you, you might not be introduced to said consequence.

I have no evidence besides my own experience, but I think that the "back the blue" mentality might skew their support staff's objectivity a bit. Especially in smaller cities and towns where cops aren't just law enforcement, they are foundational pillars of morality and governance. The point I hope I'm making is that they are getting bad advice not because they are stupid, or the people around them are, but rather because it's inevitable due to complex social and psychological reasons.

This. The cops don't care if they "look bad" because looking bad doesn't cost them anything. They don't lose any money. The populace is no more entitled to resist them so their jobs are no harder, their KPIs are not imperiled. Etc. etc. At best the municipality will scold them because the municipality cares very little, but not zero about police optics because it impacts their ability to do things that are unpopular.

AIUI they sued him in their personal capacities, not as the police department. Any taxpayer funded lawyer to defend the PD from such a thing would presumably not be authorized to work a civil suit for a person who happened to be employed by his client.