Senator BRANDIS (Queensland—Deputy Leader of the Government in the Senate, Vice-President of the Executive Council, Minister for Arts and Attorney-General) (14:37): This is a very important question. Let me come to it directly. The danger is the threat to witnesses. The danger is the threat to the life and wellbeing of witnesses and their families, because one of the shocking things that the Heydon royal commission has discovered is a pattern of conduct of unlawfulness by some trade unionists and some trade union leaders, particularly, though not exclusively, the CFMEU, including serial violence. Senator Cameron interjecting— The PRESIDENT: Order! Senator Cameron! Honourable senators interjecting— The PRESIDENT: Everyone come to order! Senator Brandis, you have the call. Senator BRANDIS: I think we all know why Senator Cameron is so sensitive when it comes to union thuggery. Senator Wong: Mr President, on a point of order— Government senators interjecting— The PRESIDENT: Order on my right! Before you take a point of order, Senator Wong, I was going to invite the Attorney-General to just withdraw that remark about Senator Cameron. Senator BRANDIS: I withdraw. The PRESIDENT: Thank you, Senator Brandis. Senator BRANDIS: In the published volumes of his interim report, Mr Heydon, who it should be remembered is a distinguished retired judge of the High Court of Australia, found a pattern of serious criminality, contempt for the law, threatening conduct and actual physical violence and intimidation. That is what he found in his public report. There are confidential elements of the interim report as well, which particularise further those matters. I think, Senator Lambie, you would understand very well, if a royal commissioner decides to go into the detail with particularity of specific threats of violence and physical harm to witnesses, why that would be kept confidential—and it should be kept confidential. It is a very common practice for royal commissioners and commissioners of inquiry to produce a confidential volume of their report in relation to sensitive matters such as this.