A months-long investigation into alleged criminal activity at Moon Spa in downtown Dallas ended Wednesday with the arrest of a 63-year-old woman and the execution of a search warrant at the business, according to information released in connection with the case. The woman, identified as Tsai Hsia Wu of Dallas, was taken into custody at Moon Spa, 164 SE Washington St., and booked into the Polk County Jail. The reported charges include third-degree sexual abuse, promoting prostitution, prostitution and practicing massage without a license. Polk County’s jail roster says inmate information is updated hourly and reflects people currently in custody.
The investigation began in November 2025, according to the case summary shared publicly, and involved the Dallas Police Department working alongside the Oregon Board of Massage Therapists. On Wednesday, investigators served a search warrant at the business as part of that ongoing inquiry. The Oregon Board of Massage Therapists regulates massage practice and massage facilities in the state, and Oregon law prohibits both practicing massage without a state-issued license and operating a massage facility without the required permit.
That regulatory piece matters because the case is not just a prostitution allegation. Oregon law specifically makes it unlawful to engage in or present oneself as practicing massage without a license. State law also defines promoting prostitution to include knowingly maintaining or facilitating a place of prostitution. Those statutes help explain why the case can involve both criminal allegations and professional-regulation issues at the same time.
The third-degree sexual abuse count is the most serious allegation listed publicly so far, but police have not released detailed facts explaining that charge. Under Oregon law, third-degree sexual abuse involves unlawful sexual contact under circumstances defined by statute. Without a probable cause affidavit or charging document, it would be a mistake to assume more than what law enforcement has actually disclosed. That is the part most outlets tend to gloss over, and it is exactly where reporting can get sloppy.
Investigators with the Oregon Board of Massage Therapists accompanied officers during the warrant service. Other agencies identified as assisting included the Polk County District Attorney’s Office, Willamette Valley Communications Center, Dallas Fire & EMS, Safety Compass and the Oregon Department of Justice. The investigation remains open, and Dallas police have directed anyone with information to contact Detective Jordan Schrock. Schrock is listed by the city as a detective with the Dallas Police Department.
No court filing detailing the underlying allegations was immediately cited in the public materials reviewed Thursday, so the basic fact pattern is clear, but the evidentiary details are not. That distinction matters. Arrest announcements tell readers what police believe happened. They do not, by themselves, prove the case.
