Question 1

What does a forensic DNA expert witness actually do?

Accepted Answer

A forensic DNA expert witness independently reviews DNA evidence, prepares a written expert report compliant with Part 19 of the Criminal Procedure Rules or Part 25 of the Family Procedure Rules, and gives live evidence in court explaining the strengths and limitations of the DNA findings.

Question 2

What is the difference between a DNA testing laboratory and a DNA expert witness?

Accepted Answer

A DNA testing laboratory generates the DNA profile from a biological sample. A DNA expert witness interprets what that profile means in the case, identifies weaknesses in prosecution interpretation, and gives evidence in court.

Question 3

How long does an independent DNA review take?

Accepted Answer

Most case reviews are completed within 7 to 14 working days from receipt of the prosecution disclosure. Urgent reviews can be turned around in 3 to 5 working days.

Question 4

Are Bericon's DNA reports accepted by the Crown Court and Family Court?

Accepted Answer

Yes. Reports comply with Part 19 of the Criminal Procedure Rules and Part 25 of the Family Procedure Rules. Bericon experts have given live evidence in Crown Court, Magistrates' Court, and Family Court.

Question 5

What is a likelihood ratio in DNA evidence?

Accepted Answer

A likelihood ratio expresses how much more likely the DNA findings are if the prosecution's proposition is true compared to the defence's proposition. Likelihood ratios are required by the Forensic Science Regulator for mixture interpretation.

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