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DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation. A DNA sample taken from a crime scene is compared with a DNA sample from a suspect. If the two DNA profiles are a match, then the evidence came from that suspect. Conversely, if the two DNA profiles do not match, then the evidence cannot have come from the suspect. DNA fingerprinting is also used to establish paternity.

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A Brief Explanation of DNA Fingerprinting

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Sources: yourgenome.org, encyclopedia.com, sciencing.com,infograph.vangage.com, and Biology book pg. 272,

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The problem with DNA fingerprinting is that it can be inaccurate, because of sample contamination or  laboratory error.

https://science.howstuffworks.com/why-dna-evidence-can-be-unreliable.htm

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DNA fingerprinting is based on DNA analyzed from regions in the genome that separates genes called introns. Introns are regions within a gene that are not part of the protein in gene encodes. DNA fingerprinting usually involves introns because exons are much more conserved and therefore, have less variability in their sequence.

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DNA fingerprinting is a representation of parts of an individual’s DNA that can be used to identify a person on a molecular level.