I just read Left of Bang last night. This is a new book on "Combat Profiling" , by Patrick Van Horne and Jason Riley. For some of us here there was nothing earth shattering or brand new. There was, however, a detailed breakdown of situational awareness and how to cultivate it. There is a wealth of information about spotting unusual or suspicious behavior and making timely and correct decisions about dealing with it. A worthwhile read.
At the end of the book there is a website noted for continuing education. I found some of the articles on that website to be of more value than the book itself. One needs to read the book 1st to get the terminology and a feel for their method, then go to the articles on the website for practical application.
If one read the book, went through the practical exercises on the website, and then took MUC with Southnarc he would have a pretty good grounding in spotting pre-assault indicators and other suspicious activity. Or, you could just spend 10 years in an inner-city patrol car and hope you're a fast learner. I recommend reading this book.