Good investigative field notes can lay the foundation for a successful criminal case. They are critical to piecing together a story that might one day be told to a jury. A homicide has occurred in a medium-sized city at dusk. The crime scene is very large; it is "cold," meaning there is no longer a perceived threat; and the scene has been properly secured. The following parties are on scene: several patrol officers, the medical examiner, a patrol sergeant, two homicide detectives, a paramedic, and several witnesses. Preliminary investigation revealed that a shooting occurred inside a home. Evidence has been discovered both inside and outside of the home, into the yard and nearby street. There were several people on scene during the shooting as a small party was going on. The crime scene is particularly bloody; there are numerous shell casings and some firearms that have been located and made safe. Let's review two concepts before you make a decision about this scene. What is the most important use of field notes?