Which of the following is NOT a part of the necessary details for major crimes?

The length of investigation times is not considered a necessary detail when categorizing major crimes. Typically, major crime details focus on aspects that directly relate to the crime itself or the perpetrator's actions, which help in understanding the nature of the offense and how it was committed.

Typology of offenses, for instance, is crucial as it helps law enforcement categorize the crime and understand its context. Information about a suspect's traveling route can provide significant insight into their movements, potential escape routes, or connections to other locations, making it invaluable for investigations. The time and place of occurrence are fundamental details as they set the scene for the crime, allowing investigators to piece together events and gather evidence.

In contrast, while investigation times can be relevant for case management and resource allocation, they do not provide direct insight into the crime itself or the suspect's profile. Hence, they are not considered critical information in this context.