Strategies like this are billions or more. Strategies like how to approach the scene or how to collect the evidence in different ways, but I believe that this strategy to approach a crime scene because the more information you have the easier the scene will get. Why you may ask, because the nicer you approach someone more they would like to talk and from there they start saying things they are not supposed to say but this only works in how good you approach someone and they way you act around them if you act mean they wont respect you but if you approach them in a nice way then it would be a different