Where can i find a free background criminal check with no credit card?

I need to know if this person has been a offender in washington state, grays harbor county, and if he served prison time for such an offense. If so, is he still required to report his whereabouts. I am in a position that I might marry him if he is not guilty of this charge. I have no credit card or checking account and I am on SSI disability and 60 years old thank you