What does insufficient DNA for comparison mean?

“Insufficient DNA for comparison” means that DNA was detected, but there was not enough usable genetic information to compare it to a person or generate a reliable profile.

This can occur where only very small amounts of biological material are present, where DNA has degraded over time, or where the sample is complex or mixed with material from multiple individuals.

It does not necessarily mean that DNA was absent. Rather, it means the DNA detected could not be analysed to a level that allows meaningful comparison or interpretation.

In some cases, further testing may be attempted, but the ability to obtain a usable result depends on the amount and condition of the biological material remaining.

Insufficient DNA findings are common in forensic work, particularly on clothing, handled items, and surfaces where only trace or transferred material may be present.