Which method is NOT one of the four recognized crime scene search methods?

The four recognized crime scene search methods are designed to ensure thorough and systematic coverage of a crime scene to collect evidence effectively. Among these, the zone, grid, and spiral methods are established techniques used by investigators.

The zone method involves dividing the crime scene into smaller sections or zones, which allows for a more concentrated search in areas that may contain evidence. The grid method entails conducting a double search pattern, where investigators search the scene in one direction and then return in another, typically at right angles, to ensure no evidence is overlooked. The spiral method involves a search that radiates outwards or inwards from a central point, which helps in locating evidence that may be scattered.

In contrast, the diagonal method is not recognized as a standard search technique within crime scene investigations. While other methods may allow for diagonal searching patterns, they do not have the same formal recognition or structured approach as the established methods. Hence, 'diagonal' is not considered one of the four main crime scene search methods.