SEATTLE (AP) — A woman is suing King County, saying nearly three decades ago an undercover sheriff’s detective drove her to a massage parlor knowing she was only 17 and walking into an abusive situation.

The now 44-year-old woman, who asked to be identified by her initials, M.T., filed a claim against King County seeking up to $20 million in damages.

The woman’s lawsuit raises troubling questions about when ethical boundaries are crossed between undercover police work and an officer’s sworn duty to protect the vulnerable.

A lawyer defending King County declined an interview request.