Although some may not see how the typical private investigator could use psychology to solve cases, we find it helpful to think of possible motivations for certain behaviors. This is where information from the client also becomes helpful. Any small detail can come into play while we are conducting surveillance. The goal in using psychology during surveillance or investigations is to get a better understanding of the subject. When we think of their possible motivations and why they may do certain things, it helps us get to know the subject without really knowing them. Taking into account their actions in the past and the reasons for these actions can help us determine what they may do in the future. Drawing connections such as these, and making possible predictions of future travels and/or current routines, can help us limit disconnections and accomplish surveillance goals in the field.
From years of surveillance work we have found there are many different kinds of subjects. Some are lax, easy to follow, and keep a strict routine. Others speed, constantly look around, and travel somewhere new everyday. Each one of these types of people needs to be investigated in a different way. We take into account all of the information given to us by the client, and all information gathered in the field to make our assessment as to which kind of subject we are dealing with. Even the most unpredictable become predictable because that is exactly what we come to expect from them. Getting to know your subject helps you realize what actions, meetings, and locations are relevant. Also, it helps us know what things are innocent and which need further investigation.
For example, let's say we have an infidelity case where the subject goes to the gym after work. Our client knows this is part of his routine, and she also has a membership to this gym but rarely goes. We also know that the subject disappears at random times after the gym with no explanation. The fact that our client also has a membership at this gym, and that he leaves at other times throughout the night, would lead us to believe most likely there is nothing suspicious about the time he is at the gym. This is unless we are given some other information that would change this belief. In the end, using psychology, we will know which aspects of the investigation to key on that get the best quality, and most prompt results. This saves us time and saves the client money, and that is what we pride ourselves on.