13. Ohio Killings
On August 4, 2019, the world again shook to terror when a gunman armed with an AR-15-styled rifle and body armor was seen casually killing almost nine people and injuring 27 people in just a fraction of 32 seconds.
This casual killing was condemned by the whole nation when 24-year-old Corner Betts shot people near the entrance of the Ned peppers bar in the Oregon District of Dayton, Ohio.
It was later revealed that the gunman was interested in mass shootings and killings and executed this incident purely out of his voilent streak and nature.