I don't. I work in municipal government and if anything the firewall is greater here than it is the private sector because we know all the rules. We handle citizen data in all sort of ways and the police don't get automatic access to it just because we share a boss. There are plenty of good reasons to question who handles your data and how in government, but assuming that they are in league with the police is not one of them.
I'm sure it varies wildly by place. You've got places where the rules are taken very seriously and places where the police chief is the mayor and has access to all the national law enforcement DBs with basically no oversight.
Given that policing is rife with various legal and ethical abuses in service of consolidating power and exerting control, it's hard for me to believe that there aren't places where police have deep access to government data on citizens.
