Two more people have been charged over allegations a Gold Coast legal firm defrauded Legal Aid Queensland.
An ongoing Crime and Corruption Commission probe has already charged two people with money laundering and dangerous drug offences, in December.
Another two people, a 57-year-old Rockhampton man and a 31-year-old Nerang man, have now been charged in relation to the probe.
The older man is due to face a charge of money laundering in Rockhampton Magistrates Court on March 3.
"It will be alleged the money laundering involved proceeds of serious criminal offences being paid for legal services undertaken by the firm," the CCC said in a statement on Wednesday.
The Nerang man has been charged with two counts of supplying a dangerous drug and is due in Southport Magistrates Court on March 17.
A 46-year-old Gold Coast lawyer was charged with money laundering and supply and possessing dangerous drugs on December 2.
A Burleigh Heads woman, 38, was also charged with possessing dangerous drugs on the same day.
"Any alleged criminal offending by individuals associated with the legal profession is very serious," CCC chair Alan MacSporran QC said at the time.
"Legal Aid Queensland helps Queenslanders engage with the legal system.
"Any fraud on Legal Aid ultimately impacts on taxpayers and those people who are financially disadvantaged that require access to their services."