DEPICTED BOTH GRAPHICALLY AND ALGEBRAICALLY, THE MODEL CONSIDERS FUNDAMENTAL RELATIONSHIPS BETWEEN POLICY VARIABLES (EXPERIENCE OF THE ARRESTING OFFICER), PERFORMANCE MEASURES (CASE ACCEPTANCE BY PROSECUTOR, CASE CONVICTION, EXTENT OF CHARGE REDUCTIONS, ETC.) AND CONTROL FACTORS (EVIDENCE, WITNESSES, CASE SERIOUSNESS, ETC.). AN ALTERNATIVE MODEL, BASED ON THE INDIVIDUAL CASE, IS ALSO PRESENTED. THE ARTICLE CONCLUDES BY NOTING A PRELIMINARY EMPIRICAL FINDING THAT FOLLOWS THE BASIC MODEL.