44: Stephen Paddock: The Las Vegas Massacre

Stephon Paddock was an American mass murderer who is known for being the perpetrator of the 2017 Las Vegas shooting, in which he opened fire into a crowd of approximately 22,000 concertgoers attending a country music festival on the Las Vegas Strip. The incident is the deadliest mass shooting by a lone shooter in United States history, with 61 fatalities (including Paddock) and 867 injuries, 411 of them by gunfire.