Data were collected on 118 criminal offenses. Overall, there was no increase in crime rates during the first 2 years of casino operations. A substantial decrease in crime rates was noted during the first full year of casinos, but crime rates appeared to have returned to the pre-casino level in the second year. Of the 118 offenses initially selected for examination, 31 were not tested because each of them had occurred 10 or fewer times during the 9-year period under review. Of the remaining offenses, 12 increased and seven decreased for 2 years following the introduction of casinos; 68 offenses changed little, or were statistically insignificant if changed. When the offenses were grouped into 11 broad categories, the test revealed a significant decrease in mischiefs and a significant increase in robberies following casinos. In the remaining nine categories, as well as the total of all offenses, the outcome was inconclusive. The long-term impact of casinos in Biloxi is yet to be tested. Tables, references