The computer-based approach is possible because of the similarities between the computer database process and the investigative process. Using APES permits the investigator to enter information into the computer, to receive the computer's answer to the problem being investigated, and to challenge the computer's answers. The APES system asks the necessary questions and can also tell the investigator what proof the case lacks. At the start of the process, the system has only its rules and no data. Its questions to the investigator reflect the courtroom principle that anything that is not proved to be true is false. The use of the system with a risk analysis and for analyzing a bribery case shows both its operation and its benefits. Charts and case examples.