My son was arrested for criminal trespass, has a past deferred issue from 2 years ago.does he need an attorney?

Yes. Because this matter is so important you should really get a lawyer. Many factors such as age, prosecutor discretion, what judge you have, whether witnesses are credible all matter and that makes it near impossible to say what type of time you'll do You can miss defenses and say the wrong things if you are not represented by an advocate as your attorney.

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Online we cannot know what the other details are going on in your case because online we cannot find out those details. You need a lawyer. Check with a lawyer in your locale to discuss more of the details.

Good luck to you.

God bless.

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I agree with Mr. Brinkmeier, you son needs an experinced criminal defense lawyer who works in Kitsap County. YYour son will need to enter a not guilty plea at his first hearing and find a lawery as soon as possible.
Good Luck

I agree with my colleagues that your son should discuss the situation with a WA licensed lawyer before he goes to Court, and before any decisions are made in regards to either of his cases. Obviously, if he is not guilty of the second case he needs to fight it, but the mere fact that he was arrested (a conviction is not necessary) can be a basis to violate the previous deferred dispo. Good luck.

DISCLAIMER I do not practice law in your State. This answer is provided solely for informational purposes only. This answer does not constitute legal advice, create an attorney-client relationship, or constitute attorney advertising.

He definitely will need an attorney. We generally recommend you speak to one before you go to court - this is no time for surprises. Prosecutors typically pursue a case more agressively if the person charged has been through the system before. If he is with someone with more serious charges, there is a certain detriment to him also, as their wrongdoing is sometimes held against him. Is his deferral still pending? if so, then these new charges can get that revoked also.
If you hire an attorney before court, they can typically get these answers before you go to court, and maybe strike (at least the first) the court date altogether. There is no reason at all not to get good advice and representation before he appears in front of a judge.