There has been a recent wave of drug lords executing each other in Mexico. Just yesterday, 12 were found dead yesterday across the country. As I previously mentioned in my comment on Mexico Barbaro, I feel that Mexico's crime is increasing. The stats in the following articles note the increase of crime in Mexico, with respect to crime related to drugs.
On the one hand, it is horrible to see an increase in the rise of violence in Mexico, however on the other, they are killing each other off, people who would other wise be increasing the production of drugs.
News link on drug-related killings (English)
News link on drug-related killings(Spanish)