According to the theory of transfer, what is true about interactions?

The concept of transfer theory, often associated with forensic science, emphasizes that whenever there is an interaction between two entities, there is an exchange of evidence. This is based on the premise that every contact leaves a trace. Therefore, stating that no one can enter or exit without bringing in or taking out some form of evidence aligns perfectly with this theory. It underscores the idea that interactions—whether between a suspect and a scene, a victim and an assailant, or even in less direct scenarios—inevitably involve the transfer of materials, fibers, or any number of trace evidence types.

This principle is foundational in various investigative fields, as it helps establish connections between individuals, places, and events based on the evidence left behind. The essence of this theory is to facilitate the investigation process by ensuring that every interaction is scrutinized for potential evidence, thus proving its critical importance in forensic analysis and criminal investigations.