What is a key function of the chain of custody log?

The chain of custody log primarily serves the purpose of documenting the collection, handling, and transfer of evidence throughout an investigation. By meticulously recording each instance of possession, it ensures that the evidence is accounted for at all times, establishing a clear timeline and responsibility for the item. This is crucial in legal contexts, as it helps to maintain the integrity and authenticity of the evidence.

While communicating evidence findings, classifying physical evidence, and preserving digital evidence are important aspects of the investigative process, they do not encompass the essential role of the chain of custody log, which is specifically focused on tracking the evidence collection and its subsequent movement through various stages of handling. This documentation is fundamental to prevent any questions about the evidence's integrity or the possibility of tampering, thus supporting its admissibility in court.