School shootings are, at best, incredibly rare. Considering most of the people killed in the gang violence in Rio are teenagers who are not even in school, I don’t think it is a very relevant comparison as it just shows how bad Rio really is.
This post shows what a moron you are. Serial killers exist in all societies, across all periods of time, and are not any more prevalent in areas of the United States than anywhere else, unless of course you want to consider the fact that the US and other Western countries actually give a damn to look into it.
Rio is averaging close to a dozen murders a DAY, and that is just what is reported. You can’t find any comparison or anything worst than that in the Western world in the last 20 years, period. Referencing serial killers, school shootings, and the like just makes you look like an ignorant dumbass.