Can DNA evidence be wrong?

Yes DNA evidence can be wrong

DNA evidence can be wrong, overstated or misinterpreted. However, It is also powerfully used within our courts to achieve conviction.

Read about this Australian case when the “DNA 1 billion” statistic is wrong and the evidence was withdrawn by prosecution.

Laboratory testing can accurately detect and compare biological material. However, errors may arise from contamination, transfer, mixed DNA profiles, sampling choices, or the way results are interpreted and reported.

Research and casework have shown that DNA can move between people, objects, and environments. This means DNA may be present even where a person has not directly touched an item or been present at a particular time.

Importantly, DNA findings identify biological material - they do not explain how it was deposited, when it was left, or what activity led to its presence. Misunderstandings often arise when laboratory results are treated as answers to questions they were not designed to resolve.