Final answer:
The statement that you need to draw everything in a crime scene sketch is false; focus is on key evidence and spatial layout.
Step-by-step explanation:
When sketching a crime scene, the statement that 'you need to draw and fix everything in the room/scene' is false. While it is important to capture the overall layout and spatial relations between objects, not every minute detail must be included. Crime scene sketches are used to create a faithful representation of the scene, focusing on key pieces of evidence and important features. This helps others, such as jurors or other investigators, understand the spatial dynamics of the crime scene. Therefore, while key elements and evidence must be accurately recorded, it is not necessary to fix every small item within the sketch.