The HRO project provides intensive supervision for selected probationers and parolees deemed to be at high risk for serious criminal activity. Selection is based on past behavior. Two-person teams supervise caseloads of 40-50 offenders. Supervision involves close surveillance and special probation or parole conditions designed to discourage criminal activity. Sixty-eight percent entered the HRO program from correctional institutions, and 27 percent were probationers or mental health cases committed to treatment institutions after a criminal offense. All had at least one prior violent offense. Eighty-three percent had prior assaultive offenses, 36 percent had at least one prior sexual assault, and 45 percent had injured a victim during a crime. As of May 1986, approximately 46 percent of the clients had been revoked, 10 percent had been successfully discharged, 4 percent had been transferred to regular supervision, and 40 percent were still under intensive supervision. Approximately 25 percent of the clients for whom a 1-year followup was possible were returned to prison for criminal activity or a technical violation of probation or parole. This study is not intended as an assessment of the project's impact on offender behavior, so no conclusions are drawn about the project's effectiveness. 4 tables.