If a civilian is wearing a mask to cover their identity inside city limits, they can be fined for disorderly conduct. They will have to remove their mask and show their identity. Otherwise, they can be charged with Failure to Comply.
If a suspect commits any crime or traffic violation he has to remove his mask. Failing to do so will be Failure to Comply.
If a suspect refuses to remove his mask remove it by force and charge them accordingly.