21-year-old Toi Mutsuo was severely depressed and suffered from tuberculosis and rejection. In the early hours of May 21st, 1938, Mutsuo used an axe to decapitate his grandmother. He then cut the electricity line to the village and strapped two torches to his head, before moving from house to house and killing anyone he found inside with a shotgun, axe, and a katana. He committed suicide by shooting himself in the chest, but not before he’d taken the lives of 30 innocent people.
The Virginia Tech massacre was a school shooting that took place on April 16, 2007,on the campus of Virginia Polytechnic Institute & State University in Blacksburg,Virginia, USA. Seung-Hui Cho,a senior at Virginia Tech,shot and killed 32 people & wounded 17 others iNn 2 separate attacks, approx. 2 hours apart,before committing suicide(another 6 people were injured escaping from classroom windows) http://en.wikipedia.org/wiki/Virginia_Tech_massacre
Nehemiah Griego - In 2013, at the age of 15, Griego shot and killed his parents and three siblings. His charges were adjudicated in the juvenile court and he was committed to a juvenile detention facility until the age of 21.