The second fundamental theory of fingerprints states that a fingerprint remains unchanged once the individual enters adulthood.

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The second fundamental theory of fingerprints states that a fingerprint remains unchanged throughout a person's lifetime. The theory was disproven in the 1930s with the development of forensic techniques that revealed subtle changes in fingerprints over time. Therefore, fingerprints can change due to injury, aging, and even deliberate alteration.

The Second Fundamental Theory of Fingerprints States That a Fingerprint