Let's put it this way. Cop pulls in behind you and turns on lights and beeps the siren and you don't stop. What happens? Let's say at that point you run from them. What charge will you face?
Ah, that would be a felony, LT. I believe it is now called "Felony Eluding".
RCW 46.61.024
Attempting to elude police vehicle — Defense — License revocation.
*** CHANGE IN 2010 *** (SEE 6239-S.SL) ***
(1) Any driver of a motor vehicle who willfully fails or refuses to immediately bring his vehicle to a stop and who drives his vehicle in a reckless manner while attempting to elude a pursuing police vehicle, after being given a visual or audible signal to bring the vehicle to a stop, shall be guilty of a class C felony. The signal given by the police officer may be by hand, voice, emergency light, or siren. The officer giving such a signal shall be in uniform and the vehicle shall be equipped with lights and sirens.
Please note that "Class C Felony" part. That could mean jail time.
The only defense allowed:
2) It is an affirmative defense to this section which must be established by a preponderance of the evidence that: (a) A reasonable person would not believe that the signal to stop was given by a police officer; and (b) driving after the signal to stop was reasonable under the circumstances.
This of course has no bearing on the original question though.
In response to whether one HAS to offer that they are carrying and have a CPL, not in Washington. Remember though any courtesy shown an officer who has you stopped just might yield a courtesy in return. You could hold to strictly what is required by law and they you might in return have the officer doing all he can get away with under the law. You may not be arrested or detained but you may spend a lot more time than necessary waiting for him to finish his paperwork. For example, lets say that 30 minutes or more might be considered "being detained". He may spend 29 minutes before returning your license. You may be "free to go" but do you want to drive away with your DL still in his possession?