Two reporting paths, depending on where it's happening
Suspected abuse, neglect, or financial exploitation is reported to two different agencies in Washington depending on where the parent lives. Both accept anonymous reports and both will start a welfare check or an investigation within 24 to 72 hours.
Call the LTC Ombudsman first
Also report to DSHS RCS
If financial exploitation is involved, call the bank too
After the immediate hour
Once the crisis is delayed or stabilized, you have time. Take the standard quiz to get curated picks for the longer arc. COPES eligibility, your AAA, family caregiver support, what to set up before the next round.
These scripts are paraphrased from caregivers who have been through these situations on r/dementia, r/AgingParents, ALZConnected, and AARP. They are not legal or medical advice. The LTC Ombudsman, your AAA, and the Alzheimer's helpline are all free and can advise on the specifics of your situation.