The techniques of tailing someone are acquired skills. When following someone we are constantly weighing two factors against each other. First, we want to stay close enough to make sure we do not lose the subject at a traffic light or in heavy traffic. However, we don’t want to stay so close that we run the risk of being observed by the subject. The art of balancing these two factors in a variety of situations can only be executed by having an experienced investigator working the case. In some cases, a second agent is preferable or required which allows   us to keep safer distances while not minimizing the chance of losing the subject.