 The anti-cartel operations begun by President Calderón in December 2006 includes ballistic checks of police weapons in places where there is concern that police are also working for the cartels.In June 2007, President Calderón purged 284 federal police commanders from all 31 states and the Federal District.Under the 'Cleanup Operation' performed in 2008, several agents and high-ranking officials have been arrested and charged with selling information or protection to drug cartels; some high-profile arrests were