Grey's Anatomy, Season 7

Lexie:
I read a book. About the history of mass murders in the US. You know, that's the actual name of what happened to us, it was a mass murder. You can't call it a terrorist attack because the murders weren't political in nature. And we weren't the victims of a serial killer because Mr. Clark would have had to had murdered several people over a period longer than 30 days to qualify as a serial killer. We-- We could call it a spree killing which is defined as killings in two more locations with no break or pause in between 'cause Mr. Clark shot that guy in his car before he got here. But I-I'm not sure that, that counts as a true second location since it was so close to the hospital. Which means that we were a mass murder. Because it happened at one place, by one person, and more than four people were killed.