southeast side of snyder hall. >> reporter: the shooting began in snyder hall. it didn't end there. the shooter continuing his rampage into the science building. casualty found in at least two different classrooms. >> our ana cabrera joins us now by phone. we know so many people in that community are grieving just aas many people asking questions about what can be done now. >> reporter: and that is the big question, not only why did this happen and how do you prevent this from happening to somebody else, some other community? it's interesting because the sheriff, who's now taking a lead role in the investigation, at least the face of the investigation and updating the media, has in the past been a staunch opponent of any new gun control legislation. in fact, as recently as just a couple of years ago following sandy hook when legislation was moving its way through korngs he himself, john hanlin, the sheriff of douglas county, he wrote a letter to vice president joe biden saying regardless of