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.

EXCLUSIVE CRIME SCENE PHOTOS: Joran’s Bloody Shirt & Inside The Murder Room

“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.”

PHOTOS: Van der Sloot With Peruvian Victim Just Hours Before Her Murder

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.

PHOTOS: Celebrities Involved In Murder

“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.

WORLD EXCLUSIVE: Witness Who Found Murdered Woman In Van Der Sloot’s Room; Read Her Witness Statement

“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.”

Two law enforcement specialists say RadarOnline.com’s explosive revelation that Mel Gibson admitted hitting Oksana Grigorieva because she “f--king deserved it” could be crucial to the Los Angeles Sheriff Department’s domestic violence probe into the actor.

“The tape will be crucial,” former FBI agent and private investigator Harold Copus tells RadarOnline.com. “Having the confession on tape takes it over the threshold and takes the investigation to the next step.”

PHOTOS: Mel Gibson & Oksana’s Loving Embrace On The Beach

“The cops will ask Oksana if it’s true and if she wants to press charges,” defense specialist Steven Cron adds. “If she does, Mel would be prosecuted for domestic violence and he would have to defend himself.”

“Until now it’s been a he-said-she-said,” Copus explains. “Now we’re getting into facts. It doesn’t look good for Mel.

PHOTOS: Oksana Shows Off Her Post Baby Body

“His lawyers will do everything they can to suppress the tape,” Copus continues. “That will take care of the criminal actions but it will get messy before it gets better.

“The bottom line is that normally when you see violence escalate like this the female is in extreme danger. The fear is what he [Mel] will do if action isn’t taken.”

EXCLUSIVE: Mel Gibson Caught On Tape Admitting He Hit Oksana – “You F**king Deserved It”

Even if Mel is convicted, he most likely won’t be serving any jail time says Cron. “Generally on a first offense someone would spend a year in a domestic violence program and maybe some anger management.

“There is typically no jail time on a first offense.”

PHOTOS: Mel Gibson & Oksana At A Pre-Oscar Bash

However, Copus is convinced that if Mel manages to escape the criminal suit it still won’t be over for the Braveheart actor.

“If he dodges the criminal bullet, he’ll get hit with a civil bullet.”

WORLD EXCLUSIVE: Another Mel Gibson Slur Caught On Tape – Calls Latinos “Wetbacks”

Lieutenant Richard Erikson with the Los Angeles County Sheriff’s Department tells RadarOnline.com: “An investigation of domestic violence was launched by Malibu/Lost Hills Station Detectives in July, 2010, involving actor Mel Gibson and his former girlfriend Oksana Grigorieva. The detective in charge of the investigation is currently gathering information regarding the allegations. Due to the investigation being preliminary in nature, no other information is available at this time.”

Oksana recorded the conversation because she said that Mel had threatened her life. On the tape, Mel was heard saying: "I am going to come and burn the f--king house down... but you will blow me first."