with Felipe Calderon, in the "Mérida Initiative", and newspapers started printing articles mentioning all the severed heads which were appearing all over the place, even with gangsters rolling heads into bars to scare the bejesus out of their targets.
Don't forget all the bodies which also started appearing hanging from bridges, too.
Here's an article quickly google grabbed which discusses the huge car wreck Bush and Calderon created:
10 Years of the Mérida Initiative: Violence and Corruption
MERIDA INITIATIVE
/26 DEC 2018 BY ANNA GRACE
he Mérida Initiative celebrates its tenth anniversary this year. Yet since it began providing funding for security in Mexico, problems to do with violence and institutionalized corruption have worsened, suggesting flaws in both the approach and implementation of the Initiative.
The origins of the Mérida Initiative, a bilateral security cooperation agreement between Mexico and the United States, hark back to 2007 when former president Felipe Calderón appealed to the administration of President George W. Bush for assistance in tackling drugs and arms trafficking.
Since signing the agreement, the Mexican government has received nearly $2.9 billion in assistance from the United States. This assistance has supported the purchase of military equipment; training for judiciary personnel and improvement of courtroom infrastructure; military training along Mexicos southern border; and the implementation of crime prevention programs.
Critics state that the Initiative focuses too heavily on the use of military forces to tackle organized crime. US aid to the program supported former President Felipe Calderóns war on drugs, which led to a spike in homicide rates across the country that continue to rise today.
More:
https://insightcrime.org/news/analysis/merida-initiative-failings-violence-corruption/