Two Ngarrindjeri men were controversially executed by hanging along the Coorong on 22 August 1840, after a drumhead court-martial conducted by Police Commissioner O'Halloran on the orders of Governor George Gawler.
In addition, he enunciated the view that the "secret women's business" of the Ngarrindjeri women during the Hindmarsh Island bridge controversy was a fabrication, and came to the defence of the murdered Dutch politician Pim Fortuyn who called on Muslim immigrants to assimilate into Dutch society and culture.