I doubt we will see the Hawkins Police Department at all in season 4. After all, "we are not in Hawkins anymore".

Mike, Dustin, Max, Lucas, Steve, Robin, and the science teacher are still in Hawkins though

Haynes - I doubt much is going to happen in Hawkins in S4.

Ya never know man, ya never know

It all started there, the duffer bros aren’t just going to give it up that easily

This is just fan theories