117 inmates in 5 prisons completed a Victimization Screening Questionnaire to determine if they had been involved in any of 6 victimization incidents during a 12-month period. They were also asked about specific aspects of prison life to acquire data on the inmate code. The most common type of victimization was assault. Informal rules of social control included things such as “don’t trust anyone”. Results indicate a substantially higher rate of victimization than that officially reported.