...I'll note that the bar for "Mass Shooting" has been significantly lowered.
In most urban areas, that's called a "Double Homicide" and sometimes doesn't make page three of the local news, unless it's really spectacular, like the birthday cookout in Indy a couple years back that got sprayed in a drive-by, killing two and wounding six, which you didn't hear about because it happened to non-photogenic people in the 'hood.
Let it happen to whitey in a suburban mall, however, and the national satellite uplink trucks converge and the talking heads all rub their chins and furrow their brows for fifteen minutes on the network morning news program.
(You know the morning news program of which I speak: It's the one on the network that employs Bob Costas, the network being sued for lying about Mr. Zimmerman. No anti-gun Bias in their Coverage, no sirree.)