Final answer:
There are three main types of fingerprints found at crime scenes: arches, loops, and whorls.
Step-by-step explanation:
Fingerprints found at crime scenes can be classified into three main categories: arches, loops, and whorls.
1. Arches: These fingerprints are characterized by a smooth and flowing pattern that starts from one side of the finger and flows to the other side, forming a gentle arch. There are two types of arches: plain arches and tented arches.
2. Loops: Loops have a pattern that enters from one side of the finger, curves around, and exits from the same side. There are two types of loops: radial loops, which open towards the thumb, and ulnar loops, which open towards the pinky finger.
3. Whorls: Whorls have a circular or spiral pattern that may have one or more points of divergence. There are four types of whorls: plain whorls, central pocket whorls, double loop whorls, and accidental whorls.