abstract: Mexican drug cartels have been a difficult group to get official data on because of the clandestine nature of their operations and the inherent dangers associated with any type of research on these groups. Due to the close relationship that the United States and Mexico share, the United States being a heavy demander of illicit drugs and Mexico being the supplier or the transshipment point, research that sheds light on cartels and their effects is necessary in order to solve this problem. A growing concern is that cartels have been seeking to improve their international infrastructure. This could potentially be done by partnering with gangs located in the United States to help with the distribution of drugs. The author uses data from the 2009 and 2010 Arizona Gang Threat Assessment and three sets of analyses (dummy variable regression, change score, multinomial logistic) to shed light on the possible partnership between cartels and U.S. based gangs. Primarily using the varying level of intervention strategies practiced by police departments throughout the state of Arizona, this study is exploratory in nature, but attempts to find the effectiveness of intervention strategies on "cartel affiliated" gangs, as identified by federal authorities, and how police departments respond towards these same groups. With the current data, there was no significant evidence that suggests that intervention strategies were less effective on "cartel affiliated" gangs or that police departments were responsive towards these “affiliated” gangs. / Dissertation/Thesis / Masters Thesis Criminology and Criminal Justice 2015