Gunpowder Plot
The main Jesuit in England, Father Henry Garnet was said to know the details of the plot. Oswald Tesimond, a fellow Jesuit had told him. Robert Catesby confessed them to Tesimond, and gave him the permission to tell Garnet. Although he was convicted, there has since been some debate over how much Garnet really knew. As the details of the plot were known through confession, Garnet was not allowed to reveal them to the authorities. He did not think it was a good idea. Nevertheless, the plot went ahead. Garnet's opposition to it did not save him from being hanged, drawn and quartered for treason in 1606, though.