May the souls Rest In Peace ... I strongly feel that the killer was a maniac ... and u can't do much about that ... As it says that u can't set fields for an overboundary in cricket , same way it's really difficult to judge the behavior of a lunatic who is not in his senses ... Even if the arms policy is casual in US , these type of incidents doesn't happen on a regular basis ... In india the arms acts are stringent when compared to US but the people (ex: ranveer sena , Fidayeen terrorists etc.) who are hell bent upon doing massacar still manages to acheive their goals with illegal guns and bombs ... So I feel the policies doesn't have much role to play in this kind of incidents ... The victims were probably very unlucky ...