How is a crime scene analyzed?

The police, criminal investigators, forensic scientists, and/or FBI collect physical evidence, which is evidence at the crime scene. They also take photographs at the crime scene and take notes (like to say what time and location the incident happened), and they also do sketches on the crime scene. They draw out two sketches--one is called the rough sketch, which is drawn at the scene. The finished sketch is the sketch drawn after being at the crime scene. Finished sketches include measurements, precise locations, and other things that will help them solve the crime scene.