What type of information is considered unacceptable in a crime scene report?

Hearsay is considered unacceptable in a crime scene report because it refers to information that is not based on a witness's direct experience but rather on what others have said. This type of information lacks the reliability and credibility that firsthand observations provide, as it may carry biases or inaccuracies from the original source.

In contrast, firsthand observations represent the accurate accounts of those who directly witnessed events at the scene, while empirical data includes measurable and observable facts that can be verified. Documented evidence refers to official records and physical evidence collected during the investigation. All of these options contribute to a solid and trustworthy crime scene report, whereas hearsay does not possess the same level of reliability and can lead to misinterpretation of events or facts.