Detection of Biological Traces
Detection of biological material and determination of its nature
is the first step in handling evidence that arrives at the lab for analysis; this aims at then choosing the most appropriate method of sampling, isolating and analysis genetic material.
A. Detection of biological material
The detection of biological material on evidence is carried out using a UV lamp. This device emits ultraviolet light, which causes the sites where the material is deposited to fluoresce. In this way, we can check whether visible stains contain biological material or if there are other deposits that are not visible to the naked eye.
Β. Determination of the nature of biological material
After detecting the biological material, guiding tests then are applied which will point to its nature, i.e. if it is blood, saliva, semen or other biological material.
1. Detection of blood
To detect blood, 3 different tests are applied depending on the needs of each case.