When it is needed
When it is necessary to understand exactly what a trace examination established and which conclusions go beyond the genetic result.
What we examine
- Description of biological objects in the report.
- Examination section and information about control procedures.
- Identification conclusions and their statistical justification.
Materials to prepare
- Complete document and appendices after transfer arrangements have been agreed.
- Description of object provenance and collection.
- Questions posed and list of comparison samples.
- Specific comments on interpretation of the result.
Sample questions
- Which objects and comparison samples were actually examined?
- Is the material examined a mixture, and was this considered in interpretation?
- How are limitations of the genetic profile obtained described?
- Which hypotheses are compared in the statistical justification?
- Do the results allow conclusions about when and under what circumstances the trace appeared?
How the work is carried out
- Identify the objects, tasks and examination scope from the documents.
- Analyse profile interpretation and the connection of calculations to the stated hypotheses.
- Assess the limits of the final conclusion and prepare questions for the provider.
Result
A focused analysis distinguishing established genetic features from circumstances not determined by this examination.
What affects the conclusions
DNA originating from a person does not automatically establish the time, method and circumstances of material transfer. A new laboratory analysis is agreed separately.
Frequently asked questions
Can DNA determine when a trace appeared?
A genetic identification result alone usually does not answer this. Timing requires other input data and specialist examinations.
Do you examine an item brought without documents?
The general form does not provide for receipt of biological material. Object provenance, admissibility of transfer and the appropriate provider are discussed first.