Self-report questionnaires were distributed to 198 inmates, with 182 completing the questionnaire. Self-report data were supplemented by matching questionnaires with official institutional records on each inmate. Institutional rule-breaking behavior of inmates was measured by a weighted composite rule-breaking behavior of inmates was measured by a weighted composite score representing the seriousness of rule infractions admitted in response to a seven-item, self-reported checklist. Findings revealed that administration justice in prison is not color blind. While black and white inmates were equally likely to engage in rule-breaking activity, blacks were more likely to be officially reported for rule infractions. A prior record of official disciplinary action influenced subsequent sanctioning decisions, thus amplifying the racial bias. Analyses of separate models for black and white inmates revealed the importance of prior record to be differentially imputed on the basis of race. Since today's sanctioning decision is tomorrow's record, the above process is continuous and serves to confirm stereotypic expectations that blacks are dangerous and threatening and to justify differential response in succeeding disciplinary actions. In addition, it appears that custodial strategies adopted by guards may actually cause the inmate behavior they are intended to control. Tabular data and 25 references are included. (Author abstract modified)