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DNA - A Prosecutor’s Practice Notebook Inventory

Rebuttal Strategy

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The decision to call a rebuttal expert witness depends on the particulars of the prosecutor's case and the defense's assertions. The prosecutor may want to call a rebuttal expert witness if the defense makes arguments, suggestions, or presents evidence of one or more of the following issues concerning the DNA typing:

  • Contamination
  • Degradation
  • Planted or switched DNA
  • Qualifications of the DNA analyst
  • Failed proficiency testing by DNA analyst
  • Error rates
  • Database challenges
  • Catch all

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