Back to topics

How can a distant cousin's DNA point toward an unknown person?

A DNA comparison can suggest relatives without naming the person being sought. Shared stretches of DNA offer clues about possible relationships; family records and independent evidence have to do more work. The US Justice Department’s 2019 policy makes the distinction explicit: a genetic association is a lead, not by itself grounds for an arrest.

5–7 min

Questions you could explore

  • Why might the same amount of shared DNA fit more than one family relationship?
  • Whose privacy is involved when one person contributes a sample?

Start reading

Ready to try your ideas aloud?

Your topic carries over. Record up to 2½ minutes, depending on your plan.

Law and rights

Who decides what in an Irish criminal jury trial?

The judge and jury share a courtroom while answering different questions. In the Irish jury-trial example, the judge directs on law, the jury reaches a verdict from the evidence, and sentencing after a guilty verdict belongs to the judge.

3–5 min
How can a distant cousin's DNA point toward an unknown person? | Speech Topic | speaking.app