The young gunmen killed 12 students and a teacher before killing themselves.

Kretschmer killed 15 people, including nine students and three teachers at the school, before killing himself.

He told us he was going to kill somebody as a lesson, before killing the President.

She added: "People are saying he made his wife watch as he tried to kill the children before killing her."

They go to an abandoned warehouse, using themselves as bait, in the hopes that the gangs will kill each other before killing them.

Kai killed 2,807 of his men before killing Ring Torbin.

In the Columbine High attack in 1999, two teenagers killed 12 fellow students and a teacher before killing themselves.

A man followed his estranged wife as she drove to a restaurant with acquaintances and killed her and three others before killing himself Saturday.

During a 14-hour siege, the gunman wounded another officer and killed his 88-year-old grandmother before killing himself.

In 1984 her father killed his second wife and Sarah's half-sister before killing himself.