Derrick Bird
A disgruntled cab driver, Derrick Bird, 52, went on a deadly shooting spree in England, leaving 13 dead, including his twin brother. 25 people were also left injured, including his cancer stricken mother.
Bird became enraged when fellow cab drivers in his area, began stealing fares, via jumping ahead of him in the queue. He vowed revenge and began shooting at people in Britain's Lake District.