The assistant police chief at UW Madison says communication is one way to avert campus tragedy. Assistant Chief Dale Burke says that, in the vast majority of cases, people don’t just “snap,” and the shootings at Virginia Tech appear to bear that out. “This young man (Virginia Tech shooter Cho Seung-hui) had pictures on Facebook, showing him with guns and ammunition,” notes Burke. “That kind of information needs to be brought to the attention of people who can do something about it.”