El Universal has a piece about a Sinaloa family intimately involved in state politics and the criminal justice system that has extensive links to drug traffickers. The article is based on recent army operations at the family's homes, as well as procuraduría (which is like the Department of Justice) files.
At first glance, it seems like kind of a weird article for El Universal to run, since none of the names are famous and the connection between drugs and politics in Sinaloa is about as shocking as that between water and wetness. On second thought, though, I think national papers should run as many of these stories as possible. It establishes a concrete public record of official wrongdoing, which hopefully will allow Mexicans to sort through the countless rumors about politicians. It's also a lot easier for Mexico City papers to publish such stories, since local papers are more vulnerable to retaliation.