New publication - The reliability and reporting of DNA match strength for uncertain genotype evidence.

What Recent Peer-Reviewed Research Means for Investigations with Low-Level DNA

Short answer

Important DNA evidence can go unused in a case if the interpretation or reporting are limited.

That is the real investigator problem this page addresses. When a DNA result comes back low-level, mixed, or inconclusive, the question is not whether the science is interesting. The question is whether the evidence still has case value.

Our recent peer-reviewed Heliyon paper helps explain why a low-level or inconclusive result may not be the end of the road.

Why Low-Level DNA Hinders Cases

Investigators often see the same pattern.

The item matters. The result comes back limited. The DNA evidence goes unused.

That can happen when the evidence is low-level, mixed, touch, degraded, or otherwise difficult to interpret. The practical issue is not just whether DNA is present. The issue is whether the interpretation and reporting protocols produced a usable answer.

What Recent Research Means for Investigators

In our recent peer-reviewed Heliyon paper, we report that many laboratories use threshold-based approaches that discard DNA data and limit reporting. We also establish that this loss of information becomes more common when evidence has multiple contributors or very little DNA.

For investigators, the practical meaning is simple: a limited first answer does not always mean the item has no case value.

Why a Weak Result May Still Matter

A low LR result may be considered unusable and discarded.

But our recent peer-reviewed findings confirm that low LR results can still be reported with error-rate context. That matters because it gives investigators a more contextual way to understand the reported DNA results.

Why the First Report May Not Be the Last Word

Sometimes the problem is not whether there is DNA data.

Sometimes the problem is that the current interpretation did not get enough usable value from the data to help move the case.

That is why important items should not be written off too quickly just because the first answer was limited.

When to Request a Free TrueAllele Screening

A free TrueAllele screening makes sense when:

  • the item is important to the case
  • the initial reported result was limited, mixed, or inconclusive
  • the evidence is low-level, degraded, or hard to interpret
  • you need to know whether the same DNA data may still help the investigation

Ready to Submit?

Tell us about your case. We’ll review it and tell you if we can get more information from the DNA data.

Free Screening

We don’t retest physical evidence items. We interpret the electronic DNA data a lab already generated.