Secondary prevention techniques rest heavily on the idea of identifi cation and prediction. Rather than intervene with entire communities or neighborhoods, or establish programs to reach the general public, secondary prevention techniques rely on efforts to identify potential offenders, places, or situations that have a higher likelihood for criminal activity. One primary problem for secondary prevention, therefore, is proper identifi cation and prediction. Predicting who will and who will not become deviant, where and when crime will occur, who will be a victim, what items will be targeted by offenders, and related topics is often a diffi cult or involved effort. This chapter briefl y explores the problem of prediction and identifi cation for prevention purposes. The discussion is divided into three general areas: predicting offending behavior, analysis of risk factors for deviance, and identifying places, times, and individual victimization.