A fingerprint is a unique pattern of lines, whorls and loops that are found on the tips of our fingers. Each person has their own distinct set of fingerprints which can be used for identification purposes. Fingerprints are formed during early foetal development when the ridges on our fingertips begin to form. These patterns remain unchanged throughout a person's life, making them an effective way to identify individuals. In criminal investigations, fingerprint evidence is often used as primary proof of identity and can be compared against databases to help solve crimes or clear suspects.