Queensland's opposition has claimed legal advice on tough youth justice changes has been kept secret by the state government, breaking a promise to release it.The LNP's adult crime, adult time policy sees juvenile offenders found guilty of serious crimes, including murder and manslaughter, charged as adults and face heavier penalties.An expert legal panel was established last year to advise on new offences to be included, twice recommending it be expanded.The state government consistently said it could not release the panel's advice until its work was finished.Earlier this month, the latest round of offences was announced, including aiding suicide and riot, drawing criticism from some stakeholders who said they were rarely committed by children.At the time, youth justice minister Laura Gerber committed to publishing the advice outlining why the 12 new offences and existing crimes had been included in the policy."It's the advice of the expert legal panel over the course of their work," she said on March 1."They've completed their work That is the advice," she said. "I would probably suggest that the Labor Party are peddling these mistruths because they don't support adult crime, adult time."The Bar Association of Queensland's Laura Reece KC told the committee it was "apparent" the release was not the advice provided to the government."It's a report which states that advice was provided to cabinet," she said. None of the five-member expert legal panel fronted the committee.Committee hearings on the latest expansion to adult crime, adult time, continue next week before the legislation returns for debate in state parliament.