When would a concentric circle (spiral) search method be used?

The concentric circle (spiral) search method is especially effective in small outdoor areas for locating evidence due to its systematic approach. This method involves starting from a central point and moving outward in a spiral or circular pattern. It allows the searcher to thoroughly cover the area while ensuring that no part is overlooked, making it ideal for smaller spaces where evidence might be concentrated.

In contrast, urban environments and larger outdoor areas may require different search methods, such as grid searches or sector searches, to efficiently cover large distances and accommodate obstacles. Tracking moving suspects typically necessitates more dynamic searching techniques that adapt to the suspect's movement rather than the more methodical approach of concentric circles. While the method can be applied indoors, it’s most suited to small outdoor areas where the likelihood of finding concentrated evidence is higher.