<Tr> <Th> Date </Th> <Th> Location </Th> <Th> Deaths </Th> <Th> Injuries </Th> <Th> Description </Th> </Tr> <Tr> <Td> 000000001960 - 02 - 02 - 0000 February 2, 1960 </Td> <Td> Hartford City, Indiana! Hartford City, Indiana </Td> <Td> </Td> <Td> 0 </Td> <Td> 44 - year - old school principal Leonard Redden killed teachers Harriett Robson and Minnie McFerren inside their classrooms at William Reed School . Redden then fled to a wooded area where he killed himself . </Td> </Tr> <Tr> <Td> 000000001960 - 03 - 30 - 0000 March 30, 1960 </Td> <Td> Alice, Texas! Alice, Texas </Td> <Td> </Td> <Td> 0 </Td> <Td> 14 - year - old Donna Dvorak, brought a target pistol to Dubose Junior High School, and fatally shot 15 - year - old Bobby Whitford, in their 9th - grade science class . Dvorak believed Whitford posed a threat to one of her girlfriends . </Td> </Tr> <Tr> <Td> 000000001960 - 06 - 07 - 0000 June 7, 1960 </Td> <Td> Blaine, Minnesota! Blaine, Minnesota </Td> <Td> </Td> <Td> 0 </Td> <Td> 41 - year - old mail - carrier, Lester Betts, confronted 33 - year - old principal, Carson Hammond, in his Blaine Elementary School office, and shot him dead with a 12 - gauge shotgun . </Td> </Tr>

How many school shootings have happened in the united states since columbine