Is the arrest system the "Get tapped with a baton a few times and you instantly surrender/get teleported to prison" kind that every CityRPG except Iban's CityRPG V3(When he privately hosted one) has?
If it is, you could make it so that batoned criminals get stunned for a few seconds, giving you time to save them by clicking them rapidly for a few seconds, but getting a wanted level in the process if it succeeds. That should make cops suicidally charging into gunfire to get in that one lucky baton tap less frustrating.