Already have police station on your city for cityville cops and bandits ? here’s a guide for cityville police station upgrades 
how to upgrade police station in cityville ?
In order to upgrading police station you will need to catch a certain amount of bandits or purchase to upgrade.
you can see the requirements inside police station > upgrades tab
Station Level 2
Requirements to Unlock : As mentioned above you will need to gather enough items required to upgrade for the first time.
Reward : Being able to catch bandits for rewards and have cops appear in your City walking around.
cityville police station : level 2
Station Level 3
Requirements to Unlock : You will need to Catch 10 Bandits or Purchase for 60 City Cash
Reward : Your Police Station will grow in size and Police Cars will appear when you catch a bandit.
Station Level 4
Requirements to Unlock : 30 Bandits or purchase upgrade for 120 City Cash
Reward : The Police station will grow in size again and appearance will improve. Also, you will have Swat Vans appear when catching a bandit.
More Levels
Stay tuned for more Police Station Levels coming soon! This is just the beginning of the feature so get ready to upgrade your station even further.
Hope you enjoy and get ready to get involved with this awesome new way to turn your plain community building into an active building!
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What benefit is there to upgrading the Police Station? does it open up greater population or happiness?
you get more cops and more bandits to catch worth better buildings and more money and safer
At level 5 upgrade , i caught heart breaker.And i got donuts shop as reward.I thought that i can store more donuts here or will get donuts by giving goods….but nothing happens….The building have the name donuts shop but cant store or get donuts?…Then better name it as peanut shop!!!!