AUSTIN, Texas -- Police say they cracked an Austin prostitution ring after they were led to by a drainage pipe clogged with condoms.

A police affidavit filed Tuesday said investigators learned that a massage parlor was operating in a shopping strip in northwestern Austin after the realty company that had just taken control of the property grew suspicious of the activities of a tenant when they found hundreds of condoms clogging a waste disposal unit connecting the strip to the city sewer system.

Police say they found a massage parlor operating in the strip where female workers offered sexual services for pay. A woman and her husband have been arrested and charged with organized criminal activity and money laundering.

CBS Austin reports the bust came at the end of a weeks-long investigation launched after the tip came from the realty in February. The suspects were identified as Juan Wang and her husband, Joseph Emery.

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According to CBS Austin, just two days before police got the tip from the property owner, Wang was stopped at Austin-Bergstrom International Airport on her way to China carrying $30,000 in cash.

The station cited an arrest affidavit as saying she became nervous after telling police the money was for a medical procedure in her home country and that it came from her business, the Jade Massage Therapy parlor, where here stated income was just $20,000 per year. She was reportedly allowed to board the plane after providing authorities with a contact number.

In the course of their investigation, police found a series of advertisements posted to the Backpage.com website -- featuring pictures of women and Wang’s phone number -- for the Jade parlor’s services.