Thomas John Ley (28 October 1880 – 24 July 1947) was an Australian politician who was convicted of murder in England. He is widely suspected to have been involved in the deaths of a number of people in Australia, including political rivals.

On August 4, 2019, 24-year-old Connor Betts shot and killed nine people, including his brother, and wounded 17 others near the entrance of the Ned Peppers Bar in the Oregon Historic District of Dayton, Ohio, United States. Betts was fatally shot by responding police officers 32 seconds after the first shots were fired.