Which method entails a systematic examination of a crime scene?

The grid search method is a systematic and organized approach to examining a crime scene. It involves dividing the search area into a grid pattern, which allows multiple searchers to cover the area thoroughly while minimizing the risk of overlooking evidence. By dividing the space, searchers can methodically work through each section of the grid, ensuring that no area is left unchecked. This technique is particularly effective in large or complex scenes where it is crucial to document and collect all potential evidence.

In contrast, the other methods mentioned, such as the spiral search, ad-hoc search, and casual search, do not provide the same level of structure. The spiral search is typically utilized in situations where only one investigator is present and can be effective but lacks the comprehensive coverage that a grid offers. Ad-hoc searches are often improvised and lack systematic planning, leading to a higher chance of missing key evidence. Casual searches do not follow any specific protocol, and their informal nature can result in inconsistencies and gaps in the investigation. Therefore, the grid search is favored for its thoroughness and reliability in systematically analyzing a crime scene.