It prohibited Americans to travel outside the city limits of Reynosa, Nuevo Laredo, and Matamoros due to the risks of armed robberies and carjackings. The department also encouraged them to not frequent casinos or adult entertainment establishments within the cities, and established a midnight to 6 a.m. curfew. Most of the reported crimes, however, happen from Matamoros to Tampico on the Mexican Federal Highway 101, especially through the municipality of San Fernando, Tamaulipas and in northern Tampico. The Government of the state of Tamaulipas rejected the security message issued by the U.S. government and classified it as an "overreaction." In their defense, the Mexican authorities noted that Tamaulipas is safeguarded by federal forces, and that there is currently no correlation between the arrest in the U.S. state of Oklahoma and the situation in Matamoros and the rest of Tamaulipas. They also said that the incident is merely a media backlash and ignores the efforts the Mexican government is implementing. Moreover, Julio Almanza Armas, a politician from Tamaulipas, stated through "Milenio" that the reality in Mexico is not how the U.S. portrays it. He said that the drug-related violence that occurs in Tamaulipas often happens in isolated circumstances. He accepted, however, that Mexico lives through harsh times, but reiterated his stance in support of Tamaulipas. After an indictment was unsealed on 12 June 2012, the chief of the Internal Revenue Service (IRS) criminal investigation stated the following:  Horse racing is a "perfect vehicle" for laundering money from drug proceeds and hiding it from the authorities. The drug industry makes billions of dollars a year, so drug traffickers often find themselves unable to ship the cash back to Mexico, and end up laundering it in the United States. Buying ranches across the U.S. is a viable way of laundering money. When the money is not laundered, it ends up in the hands of the territorial bosses for counting and further distribution. But when the cartels turn to laundering, they make "investments in racing quarter horses purchased via bulk currency payments, wire transfers, structured deposits and bulk currency deposits." With push-to-talk Nextels, BlackBerries, UHF/VHF radio communications, the Mexican cartels can oversee their laundering operations on U.S. soil.  Treviño Morales' money laundering case serves as a worrisome reminder that the operations of the Mexican drug cartels does not end at the U.S. border with Mexico.