High Quality Content by WIKIPEDIA articles! Alexander McLeod was a Scottish-Canadian who served as sheriff in Niagara, Ontario. After the Upper Canada Rebellion, he boasted that he had partaken in the 1837 Caroline Affair, the sinking of an American steamboat that had been supplying William Lyon Mackenzie`s rebels with arms. Three years later, he was arrested by the United States and charged with the murder of the sailor killed in the attack, but his incarceration infuriated Canada and Great Britain, which demanded his repatriation in the strongest terms; suggesting that any action taken against the Caroline had been taken under orders, and the responsibility lay with Great Britain, not McLeod himself.