Investigating thoroughly is an important task that requires a lot of effort and attention to detail. To do this, one must PROBE, RESEARCH, VET, and scour the scene. Probing involves asking questions and gathering information in order to gain a better understanding of a situation. Researching involves looking into facts and data to gain a more comprehensive understanding of a topic. Vetting involves verifying the accuracy of information and sources. Finally, scouring the scene involves examining all aspects of a situation in order to uncover any hidden details or clues. All of these steps are necessary when investigating thoroughly.