Principles of Forensic DNA
for Officers of the Court
Principles of Forensic DNA for Officers of the Court
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Module 10 :: Collection of DNA

Topic 2 :: Key Legal Issues Surrounding the Collection of DNA Evidence

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Consent

The alternative to obtaining a warrant is to secure a person's consent to giving a DNA sample. The principles governing consent are simple: The consent must be voluntary.14

If there is an illegal arrest or detention, a subsequent consent will not be valid if it is the fruit of that illegality. Such consent may be valid, however, if there are intervening events (such as a consultation between the suspect and counsel) that attenuate the effect of the illegal arrest or detention.15

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