it's rivals, the tijuana cartel, the gulf cartel, the juarez cartel, the belta leifia, la familia mish la canna've uncovered some embarrassing and incriminating associations or connections between very high elected officials. the presidents and entire administrations and acts of incredible criminality. how did that change your life? >> well, when i start to make this investigation in 2005, and i really understand that it would be very dangerous, i have to say that it wasn't really a surprise for me what happened after i publish my book. what i didn't expect is that the threats came from the federal government. >> anna bell says that one of her sources said that the biggest threat was from within. that one of the most highly placed most senior law enforcement officials in mexico, had ordered her killed. >> because in my book, i put his name. and also showed some documents that proves that he was involved, that he was in the payroll of the sina lowa cartel. >> to me, the weak link are the bankers. a banker launders money, he's got a reputation, he's got a family. his neighbors think he's great. h