Which search pattern involves overlapping lines to ensure thorough coverage?

The grid search pattern is particularly effective in ensuring thorough coverage of a scene. This method involves conducting two sets of parallel search lines, one set being perpendicular to the other. By overlapping these lines, the investigator can systematically cover the entire area, leaving less room for any evidence to be missed. This overlapping technique allows for a detailed examination of the ground, making it easier to identify and collect critical evidence.

The grid pattern is often used in investigations where a high level of thoroughness is required, such as in fire investigations where even the smallest detail could be crucial in understanding the cause and progression of the fire. This contrasts with other search patterns which may not provide the same level of comprehensive coverage. For instance, the spiral pattern moves outward in a circular manner from a single point and may result in areas being overlooked, while the strip pattern consists of long lines that do not overlap, potentially missing evidence on the edges. The sector pattern divides the area into sectors but does not guarantee the overlapping paths seen in the grid pattern.