Some believe that trying to kill the cops that are chasing you or trying to escape will result in them avoiding to spend several minutes in jail. However, since the choice of participating in that crime was entirely yours, you have to accept the consequences.
Why Roleplay an Arrest?
Independently of whether you actually carried out a crime or whether you just hate OOC the cop that is chasing you, one is still expected to roleplay the arrest. Even if cops are framing you for something that you didn't commit, telling a cop OOC that you didn't do it won't help you improve your situation.
Even if you really need to avoid getting arrested for IC reasons (an example of this is that your faction committed a crime and you might be connected to it and you need to avoid further questions, and not such stupid reasons like escaping cause you hit a person), you still should try to roleplay and pay attention to what the cops are doing during the arrest in order to find some IC meanings to escape, obviously without Powergaming or Metagaming.
If you think that you have been framed, simply follow the role-play and provide IC proof that you are innocent and why not, if you deem necessary report the cop to his IC superiors.
Also keep in mind, that the law enforcement is structured in a way to have far more superior IC means to catch criminals and therefore the chance of escaping is small.
Why handle things OOC during an Arrest?
A recurring scene which I have come across during my experience in Italymafia is that whenever a person is getting arrested they tend to take things OOC. Keep in mind that an arrest is something done IC to your character and not to you as a person and therefore there is no reason to take it personally.
To sum things up...
Pros of roleplaying an arrest:
You open up new roleplay activities, therefore, you and the people around you get less bored
You interact with new people
You have something to talk about IC
You won’t end up dead and lose some money
You have a small chance of getting a reduced jail time (cops tend to appreciate roleplay and they might repay you in kindness)
If you try to run away there is still a high probability of ending up dead or in jail anyway and get a more significant jail sentence
By RPing you are not risking any administrative actions (such as being admin jailed or even further, suspended), remember that if you explicitly avoid cops using non-RP means, the result of that is breaking the server rules.
Cons of evading an arrest:
You don’t ruin your criminal record (that's a price to pay if you decide to commit a crime)
You avoid spending a couple of minutes in jail
The choice is yours to make..