waste gate

Eighteen people died when an expelled former pupil went on a shooting spree at his school in the German city of Erfurt. Masked and dressed in black, the gunman walked through classrooms killing 14 teachers, two schoolgirls and one of the first policemen on the scene before taking his own life. He was clothed completely in black and you could only see his eyes. Pupils of the Gutenberg School spent four hours trapped inside before police could declare the building safe. Chancellor Gerhard Schroeder described the massacre in the quiet provincial city as "beyond the powers of the imagination".

And this account from the New York Times in 1995: After murdering three relatives at home, a teen-ager walked to the next village today and calmly opened fire on a quiet town square, killing nine more people before turning the gun on himself. The incident was the country's worst multiple killing since 1989. "It was like he was hunting birds," said Guy Sintes, the owner of a cafe on the square in Cuers, a village near the Mediterranean port of Toulon. Television footage from the scene showed sidewalks and a car spattered with blood and a bullet hole through a shop window. "The people are devastated, totally traumatized," said the Mayor of Cuers, Guy Gigou. "The village is in shock." The boy was identified as Eric Borel, 16. The impetus for the killings was unclear. His father died recently of cancer. Neighbors, interviewed on French television, described him as taciturn and said his room was plastered with posters of Hitler and neo-Nazi themes.

Edit:
27-year-old Michael Ryan shot to death 16 people and wounded 14 others in the small farming community of Hungerford during the summer of 1987. After a "Rambo style" blood feast through the streets of Hungerford, he barricaded himself in a school building where he killed himself with a single gunshot to his head. The gunman, a loner who lived with his elderly mother, loved guns and television violence. The killing spree started in a forest outside of Hungerford. Wearing combat fatigues Ryan killed a woman who was preparing a picnic for her two children. Then he drove back to his house and killed his mother and the dog and set fire to the house. For the next two hours Ryan moved through the town, randomly killing or wounding anyone he met.
Ryan's rampage ended at the Local High School. Despondent over having killed his mum and dog, Ryan commented "I wish I had stayed in bed". After 4 hours and several talks with the police, he ended his life with the last round in his 9-mm. pistol. After his deadly rampage the British government took steps to end the right to have firearms, and to curtail television violence. Also, the film Rambo III was banned in several towns in the UK, because of Ryan's claim of being inspired by Rambo


Edit 2:
Marc Lepine killed 14 women at a Montreal university in 1989, believing feminists had wrecked his life.

Edit 3:
Thomas Hamilton (17) An avid gun collector and disgraced scoutmaster, Hamilton was known as "Mr. Creepy" by the boys in Dunblane, Scotland, a village 40 miles from Edinburg. Disliked by all his neighbors, Tom enjoyed taking pictures of young boys with their shirts off. His fixation with young boys eventually got him dropped by the Boys Scouts. In the 1980s he sponsored boys' athletic clubs but it just wasn't the same. Sadly, Hamilton never got over being dropped as a scoutmaster. After nearly twenty years, he was still seething with anger. A week before his deadly rampage Thomas wrote a letter to Queen Elizabeth II complaining about a campaign to ruin his reputation. The shame was just too much for him.
On March 13, 1996, Hamilton walked to the Dunblane Primary School with payback in mind. Armed with four guns, he burst into the gymnasium where 29 children were attending class. The vengeful ex-scoutmaster systematically slaughtered 16 kids, their teacher and then shot himself. Another teacher and a dozen other students were wounded during the rampage. The children, ages 5 and 6, were sitting in circles on the floor playing when Hamilton started firing. 13 kids died instantly. Three more died later in the hospital. Surrounded by bodies of the dead and dying, 43-year-old Hamilton turned the gun on himself and put a bullet through his brain.

Eric Borel (13) A bored French teenager, Eric woke up a Sunday morning with death on his mind. On September 24, 1995 Borel killed his mother, stepfather and brother with a hammer and a baseball bat. Then he picked up his .22-caliber hunting rifle, walked six miles to the village of Cuers and opened fire in a parking lot outside a bank and in the town square. During his half-hour morning rampage, he killed seven more people and wounded nine others before putting a bullet through his head. Two of the wounded died later in the hospital. Neighbors said the teenager was taciturn and probably upset over his father's recent death from cancer. The posters of Hitler and other neo-Nazi themes plastered all over his room also might have fueled his rage.

David Gray (13) New Zealand's worst mass murderer. In November 13, 1990, David slaughtered 13 people during a 24-hour rampage in the hamlet of Aramoana, a tiny seaside settlement in the province of Otago, near Dunedin in the South Island. He was finally shot dead by police.