Coniston massacre
The board sat for 18 days in January 1929 to consider three incidents (Brooks, Morton and Tilmouth) that resulted in the deaths of Aboriginal people, and in one more day, finished its report, finding that 31 Aboriginal people had been killed and that in each case the death was justified.
Cambodian genocide denial
Malcolm Caldwell was a British academic who wrote extensively about Cambodia, including, a few months before his death, an article in "The Guardian" denying reports of Khmer Rouge genocide. Caldwell was a member of the first delegation of three Western writers, two Americans, Elizabeth Becker and Richard Dudman, and Caldwell, to be invited to visit Cambodia in December 1978—nearly four years after the Khmer Rouge had taken power. The invitation was apparently an effort by Pol Pot, leader of the Khmer Rouge, to improve the image of the Khmer Rouge in the West, now questioned by some of its former academic sympathizers. On December 22, Caldwell had a private meeting with Pol Pot and returned "euphoric" to the guest house in Phnom Penh where the three members of the delegation were staying. During the night Becker awoke to the sound of gunfire and saw a Cambodian man with a gun in the guest house outside her room. Later that night she and Dudman were allowed by guards to venture out of their rooms and they discovered Caldwell's body. He had been shot. The body of a Cambodian man was also in his room.
The murder of Caldwell has never been fully explained. Four of the Cambodian guards were arrested and two "confessed" under torture. They said, "We were attacking to ruin the Khmer Rouge Party's policy, to prevent the Party from gathering friends in the world ... it would be enough to attack the English guest, because the English guest had written in support of our Party ... Therefore, we must absolutely succeed in attacking this English guest, in order that the American guests would write about it." Whatever the motive behind Caldwell's murder, it seems highly unlikely that it could have occurred in tightly-controlled Cambodia without the involvement of high-level Khmer Rouge officials.