A former police detective has appeared in a Brisbane court charged over an alleged multi-million dollar fraud syndicate.

Queensland police and the Crime and Corruption Commission (CCC) raided the Upper Coomera home of Mick Featherstone on Wednesday morning, where he was taken into custody.

Six others, including Featherstone's wife and son, were also charged.

Who is Mick Featherstone? Mick Featherstone was a Queensland police detective until 1996.

Mick Featherstone was a Queensland police detective until 1996. He was investigated after $20,000 disappeared following a Gold Coast drug bust, but there were no charges.

He was investigated after $20,000 disappeared following a Gold Coast drug bust, but there were no charges. After leaving the police service he became a prominent Gold Coast private detective, specialising in reputation management and corporate work.

After leaving the police service he became a prominent Gold Coast private detective, specialising in reputation management and corporate work. Featherstone's private investigators licence was last year suspended by Queensland Office of Fair Trading over another matter that is before the courts.

The Brisbane Magistrates Court heard the alleged fraud was worth between $15 million and $20 million and there were about 600 victims.

The arrest of the detective-turned-Gold Coast private investigator is the latest development in a two-year joint operation between the CCC and police anti-bikie taskforce Maxima.

Code-named Lima Violin II, it is one of the biggest investigations in the crime and corruption watchdog's history.

The CCC and police allege Featherstone was one of the masterminds of a sophisticated syndicate peddling so-called sports prediction software that has defrauded people around the country out of millions of dollars.

"It will be alleged that some of those facing charges were directors or senior employees of a private investigation firm and were involved in perpetrating frauds against members of the community via a number of different companies and schemes over an extended period of time," CCC executive director of crime Kathleen Florian said.

In September 2014 the ABC revealed that the private investigator and three Gold Coast-based companies linked to him were under investigation for running boiler rooms which promoted the software and other investment schemes.

These high-pressure sales offices would allegedly cold-call people around Australia, promising them high returns if they invested in the software packages.

Hundreds bought the software, which often cost tens of thousands of dollars.

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Alleged victims of the syndicate complained that the "phoenix" companies that sold the software would suddenly shut up shop, taking investors' money with them.

The companies would then allegedly reopen under another business name and restart the scam.

Last year, the then head of the CCC, Ken Levy, described the scale of the alleged operations in an ABC interview, saying a single boiler room syndicate had taken more than $100 million.

At the time, Dr Levy said former police officers were being investigated over allegations the syndicates may have been protected for years.

A spokesman for the CCC has told the ABC that investigation is ongoing.

Featherstone's wife Zoei Charissa Keong, 32, and 21-year-old son Zach Michael Featherstone were charged with fraud and money laundering along with Travis Burch, 36, and Robert John Doueihi, 34.

Kirsty Maria Lester, 39, and Daniel Philip Webb, 32, were charged with fraud only.

All seven were granted bail unopposed and will return to court on March 7.