The first in two years????

I'm not trying to make light of it, because it's tragic that someone was murdered at Virginia Tech. However the AP and ABC News have said this:

A female student was stabbed to death Wednesday night on Virginia Tech's campus, the first killing at the school since a deadly mass shooting there in 2007.

Why are they throwing in "the first killing at the school since..."? People aren't supposed to get killed at schools. They make it sound like it was an achievement to avoid murders for two years, like colleges have chalk boards everywhere that say, "It's been ____ days since our last murder! Go Hokies!"