New details in a pimping and prostitution investigation: 11 News has learned more about the so called "Johns" who investigators say paid hundreds of dollars for sex.

According to newly released court documents, people who paid for services at the Fuji Massage Parlor left credit card trails for investigators.

Records show there were atleast 43 people from 14 different states getting services at the parlor, eight of those lived in the Grand Valley.

The Mesa County District Attorney's office says those people may never be prosecuted.

"Going after Johns, going after people for solicitation of prostitution is not the focus of this investigation. Certainly we're gonna review every case or a case by case basis and make our decisions as to whether or not we would file but for the most part we're focusing on a much higher level of organization," Deputy District Attorney Dan Rubenstein told 11 News on Wednesday.

Investigators say 58–year–old Nan O'reilly and 52–year–old Suk Young Yu were running the operations.

They are behind bars on prostitution and pimping charges awaiting their next court appearances.