Which of the following is an example of investigative note-taking?

Field sketches are a prime example of investigative note-taking because they provide a visual representation of a crime scene or incident. This form of note-taking captures essential details such as the placement of evidence, the layout of the area, and the relationships between different elements at the scene. Through sketches, an investigator can convey complex spatial information that might be difficult to describe in words alone.

Field sketches also serve as an invaluable tool for summarizing observations made during an investigation. They help maintain accuracy and can be referenced later, aiding in the investigation's overall documentation and analysis. Additionally, well-done sketches can serve as persuasive evidence in court proceedings, illustrating critical aspects of the case to a judge or jury.

Other choices, while relevant to investigative processes, do not inherently represent note-taking in the same way that field sketches do. Witness interviews are a method of gathering information, surveillance reports encapsulate findings from observations, and police reports compile various forms of information but with a focus on formal documentation rather than visual representation.