When the conspiracy was uncovered, Blennerhassett's mansion and island were occupied and allegedly plundered by members of the Virginia militia. He fled with his family, but he was twice arrested. The second time he was held in prison until the conclusion of Burr's trial, when the latter was acquitted. Blennerhassett went to Mississippi, where he became a cotton planter. Later he moved with his family to Canada, where he practiced law and lived in Montreal. Late in life, Blennerhassett left for Europe and died in Guernsey on February 2, 1831.