This violence has generated concern among U.S. policy makers that the violence in Mexico might spill over into the United States. U.S. federal officials have denied that the increase in drug trafficking-related violence in Mexico has resulted in a spillover into the United States, but they acknowledge that the prospect is a serious concern. The Southwest Border Region and the Illicit Drug Trade Between the United States and Mexico

The nature of the conflict between the DTOs in Mexico has manifested itself, in part, as a struggle for control of the smuggling routes into the United States. The most recent threat assessment indicates that the Mexican DTOs pose the greatest drug trafficking threat to the United States. Supply of Illegal Drugs from Mexico

Mexican DTOs are the major suppliers and key producers of most illegal drugs smuggled into the United States across the SWB. Relationship Between Illicit Drug Markets and Violence

In an illegal marketplace, where prices and profits are elevated due to the risks of operating outside the law, violence or the threat of violence becomes the primary means for settling disputes and maintaining a semblance of order—however chaotic that "order" might appear to the outside observer. When assessing the potential implications of increased violence in Mexico as a result of the increasing tensions between the DTOs located in Mexico, one of the central concerns for U.S. policy makers is the potential for what has recently been termed "spillover" violence—an increase in drug trafficking-related violence in United States. Currently, there is no comprehensive, publicly available data that can definitively answer the question of whether there has been a significant spillover of drug trafficking-related violence into the United States. Although anecdotal reports have been mixed, U.S. government officials maintain that there has not yet been a significant spillover. Of note, however, the UCR data does not allow analysts to determine what proportion of the violent crime rate is related to drug trafficking or, even more specifically, what proportion of drug trafficking-related violent crimes can be attributed to spillover violence. While the interagency community has defined spillover violence as violence targeted primarily at civilians and government entities—excluding trafficker-on trafficker-violence—other experts and scholars have recognized trafficker-on-trafficker violence as central to spillover. When defining and analyzing changes in drug trafficking-related violence within the United States to determine whether there has been (or may be in the future) any spillover violence, critical elements include who may be implicated in the violence (both perpetrators and victims), what type of violence may arise, when violence may appear, and where violence may occur (both along the Southwest border and in the nation's interior). CRS analyzed violent crime data from the Federal Bureau of Investigation's (FBI's) Uniform Crime Report program in order to examine data that could provide insight into whether there has been a significant spillover in drug trafficking-related violence from Mexico into the United States. In conclusion, however, because the trends in the overall violent crime rate may not be indicative of trends in drug trafficking-related violent crimes, CRS is unable to develop fact-based conclusions about trends in drug trafficking-related violence spilling over from Mexico into the United States.
There has been an elevated level of drug trafficking-related violence within and between the drug trafficking organizations in Mexico. This violence has generated concern among U.S. policy makers that the violence in Mexico might spill over into the United States. U.S. federal officials have denied that the increase in drug trafficking-related violence in Mexico has resulted in a spillover into the United States, but they acknowledge that the prospect is a serious concern.
The most recent threat assessment indicates that the Mexican drug trafficking organizations pose the greatest drug trafficking threat to the United States, and this threat is driven partly by U.S. demand for drugs. Mexican drug trafficking organizations are the major suppliers and key producers of most illegal drugs smuggled into the United States across the Southwest border (SWB). The nature of the conflict between the Mexican drug trafficking organizations in Mexico has manifested itself, in part, as a struggle for control of these smuggling routes into the United States. Further, in an illegal marketplace—such as that of illicit drugs—where prices and profits are elevated due to the risks of operating outside the law, violence or the threat of violence becomes the primary means for settling disputes.
When assessing the potential implications of the increased violence in Mexico, one of the central concerns for Congress is the potential for what has been termed "spillover" violence—an increase in drug trafficking-related violence in United States. While the interagency community has defined spillover violence as violence targeted primarily at civilians and government entities—excluding trafficker-on-trafficker violence—other experts and scholars have recognized trafficker-on-trafficker violence as central to spillover. When defining and analyzing changes in drug trafficking-related violence within the United States to determine whether there has been (or may be in the future) any spillover violence, critical elements include who may be implicated in the violence (both perpetrators and victims), what type of violence may arise, when violence may appear, and where violence may occur (both along the SWB and in the nation's interior).
Currently, no comprehensive, publicly available data exist that can definitively answer the question of whether there has been a significant spillover of drug trafficking-related violence into the United States. Although anecdotal reports have been mixed, U.S. government officials maintain that there has not yet been a significant spillover. In an examination of data that could provide insight into whether there has been a significant spillover in drug trafficking-related violence from Mexico into the United States, CRS analyzed violent crime data from the Federal Bureau of Investigation's Uniform Crime Report program. The data, however, do not allow analysts to determine what proportion of the violent crime rate is related to drug trafficking or, even more specifically, what proportion of drug trafficking-related violent crimes can be attributed to spillover violence. In conclusion, because the trends in the overall violent crime rate may not be indicative of trends in drug trafficking-related violent crimes, CRS is unable to develop fact-based conclusions about trends in drug trafficking-related violence spilling over from Mexico into the United States.