There is more violence in schools here than in the Dominican Republic. Here it is easy to get guns. Schools are to loose with discipline. Guns can be hidden in lockers or backpacks. There should be strict dress codes and gun laws.
American kids seem angry.
Family does not seem important. I think you should stop drinking. If a kid keeps being put-down, you can only keep that anger inside, bottled up for so long. If you don't have a person, a parent or teacher to talk to, it just explodes. Sometimes it explodes in harmful ways.