Elementary, my dear Cameron.

The author comments on two research papers related to forensic sciences, one on the use of molecular phylogenetics to establish two convictions for assault and one on the use of spin-off from immunology to determine a person's age solely from blood sample. It is mentioned that in first paper human immunodeficiency viruses was used as weapon of assault. Also, the second paper was based on the fact that with age the thymus glands, responsible for the development of T-lymphocytes, shrinks