With a population of one million people, Detroit is the first city of its size in the United States to host casinos. Because the other cities that have hosted casinos are so much smaller, the experience of these cities is instructional, but it is difficult to apply their experience to Detroit to project how crime and the criminal justice agencies caseloads might increase. In order to attempt such an estimate, this memorandum will: 1. Describe a theoretical model that would predict the impact of casinos on crime; 2. Describe the experiences of other cities with casinos; 3. Explain the difficulties in attempting to apply these experiences to Detroit; 4. Estimate the number of patrons that will visit the casinos if they are to be successful; 5. Explore several methodologies that translate this increased number of visitors into an increase in the occurrences of crime, an increase in the number of arrests, and an increase in the number of events that lead people into the criminal justice system: (a) What it means to draw more people into the City of Detroit as a whole; (b) What it means to have more police officers on the streets to protect casino patrons; (c) What it means to draw more people into the Central Business District of Detroit.