There are a lot of sociopaths and psychopaths in the world. Many of them aren't evil, but once in awhile you'll have someone who lacks compassion and humanity. Take the Nazis, for example: They had no qualms conducting disgusting experiments on innocent people. But we're different in America, aren't we? Don't we have compassion for our fellow beings? These following scientists and researchers are only a few of (extremely) disturbing cases that have left black marks on our great nation.