ASIS International (ASIS) Professional Certified Investigator Practice Exam

In fingerprint analysis, whorl patterns are one of the main categories used to classify fingerprints, and there are three distinct types of whorl tracings. These types are defined based on their specific characteristics and the arrangement of ridge lines.

The three types of whorl patterns are:

1. **Plain Whorl**: This pattern features a circular or spiral arrangement of ridges, flowing around a central core where the ridges make a complete circuit.

2. **Central Pocket Loop Whorl**: This is characterized by a loop that forms a complete turn around a central core, resembling a pocket.

3. **Double Loop Whorl**: This pattern consists of two distinct loop formations that create a whorl shape, adding complexity to the fingerprint's structure.

Understanding these three types is crucial for professional investigators as they play a significant role in the identification process, aiding in the classification and comparison of fingerprints. The variety in these patterns emphasizes the complexity and uniqueness of each individual's fingerprints, making them a valuable tool in forensic investigations.