Are there any witnessed crimes Washington state citizens are legally required to report?

Q: In Washington state, are there any crimes that citizens are legally required to report if witnessed? -- Mike

A: "A citizen doesn't necessarily have a legal obligation to report crimes, however they may have an ethical obligation to do so. And, failure to report a crime or someone planning to commit a crime could open you up to legal peril, as well as civil litigation at some point. Now, on the other hand, there are people from certain professions who are mandated reporters and they do have to report certain kinds of crimes if they become aware of them." -- Duvall Police Sgt. Lori Batiot.