You first heard expert testimony that the blood found at the murder scene was positively that of Mr. Smith. Using different types of examples is much better than simply presenting difficult technical information. Don t present information that is bogged down in technical details as one expert described the DNA evidence presented at the Simpson murder trial. Visual Aids Similes Similes are used to explain complex information by using simple concepts commonly understood by the general public. For example, DNA is like a fingerprint in the way that it clearly identifies a person.
Humans have individual fingerprints which are unique to that individual.
Or perhaps, DNA is like a snowflake. No two snowflakes are alike, just as no two DNA are alike. By comparing the DNA to a more commonly understood unique identifier such as fingerprints, there is a better chance of the audience understanding how powerful the use of DNA evidence is to identifying a particular person. Unfortunately for the Prosecution of the O.J. Simpson criminal murder trial, they did not use such simple explanations of the DNA evidence to the jury. Analogies Analogies also use commonly understood concepts to explain complex information.