Final answer:
Alice is creating a Rough sketch at the crime scene, which accurately reflects the scene's dimensions and evidence locations, serving as an essential tool for investigators.
Step-by-step explanation:
Upon arriving at a crime scene, Alice is most likely creating a Rough sketch. This type of sketch is an on-the-scene drawing that accurately represents the dimensions of the scene and the location of all pertinent evidence. It is drawn without the need for artistic skill, but with the emphasis on accurate representation of the crime scene and the spatial relationship between various elements within it. The rough sketch serves as a crucial tool for investigators and is typically followed up with a more detailed, to-scale drawing that can be used in reports or in court.