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It will depend on the circumstances, but generally yes.

For example, if another person's DNA is found at the scene, it is strong evidence in support of being found not guilty.

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If another person's DNA is found at a crime scene or on a victim, it strengthens the possibility of that person's being there or in contact with the victim, but, it could depend on the circumstances and the type of evidence.

For example:

- If the victim's hair has been found on a hairdresser's coat, chances are that the victim could have been his client.

- However, if a man's semen was found on a rape victim's underwear, chances are pretty strong, but not 100 % sure, that he was the rapist. If the rapist used a condom, than the semen could have been the result of a willing encounter before or after the rape.

Generally speaking, DNA should be supported by other evidence(s) as well.

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