Jeffrey Gilham timeline

- August 1993: Helen, Steven and Christopher Gilham killed in their Woronora home.

- 1995: Jeffrey Gilham pleads guilty to the manslaughter of his brother, claiming provocation. Given good-behaviour bond.

- 1997: 60 Minutes airs allegations all three people were killed by one person.

- 2000: Inquest into Helen and Steven Gilham's death terminated with recommendation for the Director of Public Prosecutions to prosecute Gilham. But DPP declines to act.

- 2000: Tony Gilham appeals to the Attorney-General to overrule DPP. But AG declines to act.

- 2001: Tony Gilham launches private prosecution against Jeffrey Gilham. But DPP takes over the case, and terminates the action. Tony Gilham offers reward.

- 2002: Tony Gilham complains to ICAC about DPP's actions.

- February 2006: Mr Gilham charged with parents' murder.

- October 2006: Mr Gilham applies for a stay of proceedings.

- 2007: Court refuses a stay and Mr Gilham loses appeal.

- February 2008: High Court refuses leave to appeal to it because of pending trial.

- February 18, 2008: Mr Gilham's trial starts.

- April 2008: the jury in Mr Gilham's murder trial fails to reach a verdict.

- October 2008: a retrial is held

- November 2008: Mr Gilham is convicted on 2 counts of murder.

- March 2009: Justice Howie finds that the killings are in the worst category and Mr Gilham is sentenced to two consecutive life terms in prison with no non-parole period.

- February, 2010: Appeal is lodged with the NSW Criminal Court of Appeal.

- December 2011: Mr Gilham's conviction is quashed after a new expert witness casts serious doubt on a fundamental element of the Prosecution case.

- TODAY: judges to decide whether Mr Gilham is acquitted or must face a re-trial.