Final answer:
Investigators should keep chronologies, to-do lists, and separate files for key documents when organizing documentary evidence to ensure effective data management.
Step-by-step explanation:
When organizing documentary evidence, it is recommended that investigators maintain several tools to stay organized. This includes creating a chronology of events, keeping to-do lists to manage tasks effectively, and maintaining separate files for key documents to ensure important information is easily accessible. Each of these strategies plays a crucial role in organizing a large amount of data and allows investigators to draw on this information when compiling their final report.