What are some of the sources of DNA evidence?

Since only a few cells can be sufficient to obtain useful DNA information to help your case, the list below identifies some common items of evidence that you may need to collect, the possible location of the DNA on the evidence, and the biological source containing the cells. read more

Well, every cell in our body contains a full copy of our genome, so any cell obtained from a human being is a source of DNA evidence (I'm assuming tht you're referring to humans in your question). That said, some cells hold up better than others - for instance, skin cells deteriorate quite rapidly while strands of hair will persist for a rather long time - and so are better sources. read more

Gathering DNA Evidence; Identifying DNA Evidence; Crime Scene Integrity; Contamination; Chain-of-Custody; Transportation and Storage of DNA Evidence; Gathering DNA Evidence. Physical evidence is any tangible object that can connect an offender to a crime scene. Biological evidence, which contains DNA, is a type of physical evidence. read more

If an individual has received transfusions shortly before the collection of a blood sample (e.g., homicide victim), the DNA test results may indicate the presence of DNA from two or more sources. Generally the predominant DNA types reflect the types from the individual. read more