Which of the following is NOT a recognized crime scene search pattern?

• A. Parallel/Strip search
• B. Grid
• C. Inward spiral
• D. Three-dimensional sweep

Answer: (D)

Systematic coverage is the idea: investigators use established search patterns to ensure every area is examined and nothing is missed. The patterns most commonly used are strip/line searches, which scan side to side across a long area; grid searches, which add a second pass to ensure overlap and thoroughness; and spiral searches, which move inwards or outwards from a starting point to sweep an area in a continuous path.

A three-dimensional sweep isn’t a standard, formally recognized pattern. Crime scenes are typically searched in two dimensions on each level, with adjustments for stairs, multiple floors, or vertical surfaces using the applicable two-dimensional patterns or zone/sector approaches. Because there isn’t a widely taught, named 3D pattern, this option does not fit as a recognized crime scene search pattern.