ABSTRACT
An incident that happened to one of us (RSM) may be an appropriate starting point for this discussion. But imagine that it is happening to you. Wbile jogging across a university student parking lot, you observe three young men excitedly looking through the contents of a car. Wbile you are still perhaps 50 meters away one sees you jogging toward them, and two of the three quickly run away. As you approach the car the tbird understands what has happened, and also runs away. But now you are close enough to see bis face very clearly. You look into the car and see the contents of the glove box strewn around, and it seems clear that the three have broken into someone's car to steal something. Because the university security office is nearby, you jog there and report that a student car has been broken into. Further, you tell them that the three offenders ran off in the direction of the local high school. A security officer examines the car, and \.!a1ls the local police. Now the problem for the police is to nominate a suspect(s) for this offense, collect whatever evidence can be bad, and obtain an identification from you, the eyewitness.
