Joran van der Sloot is being held at a Peruvian jail for the murder of 21-year-old Stephanie Flores Ramirez and now RadarOnline.com has learned that the Dutchman is being investigated by Thai officials for his alleged involvement in the disappearance of young women he reportedly recruited for a sex slave gang.

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“I believe that police in all of the counties that van der Sloot has traveled to should investigate any cases with missing young women,” former FBI agent and current private investigator Harold Copus told RadarOnline.com. “A tiger doesn’t change his stripes.”

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After van der Sloot avoided charges in the disappearance of Natalee Holloway in Aruba, he went to Bangkok and posed as a consultant named “Murphy Jenkins” for a modeling agency, reports the National Enquirer.

Joran allegedly convinced the young women that he would make them models, but several of the girls went missing and were never heard from again.

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“I’m not surprised,” said Copus, who worked closely with Holloway’s family during the investigation into Natalee’s disappearance. “I was always concerned that there was more to him being in Thailand than we knew.

“This sex trade allegation ties directly to the allegations that eventually came out about Natalee and her disappearance.

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“It’s an indication of Joran’s character. When he was in Thailand he was only 20. It’s a clue that he knew what he was doing.”