
According to the American Board of Criminalistics, criminalistics is defined as that profession and scientific discipline directed to the recognition, identification, individualization, and evaluation of physical evidence by application of the physical and natural sciences to law-science matters.
In outlining the type of work criminalists undertake the AAFS note that 'criminalists analyze, compare, identify, and interpret physical evidence' and that 'The main role of the criminalist is to objectively apply the techniques of the physical and natural sciences to examine physical evidence'. In relation to physical evidence, The following passage form the AAFS demonstrates the diverse nature of criminalistics.
'Physical evidence may be anything: evidence so small that a microscope is needed to see it, or as large as a truck. It may be as subtle as a whiff of a flammable gas at an arson scene or as obvious as a pool of blood at a homicide scene. The enormous range of material challenges the ingenuity of the criminalist who examines and identifies hair, fibers, blood, seminal and body fluid stains, alcohol, drugs, paint, glass, botanicals, soil, flammables, and safe insulating material; restores smeared or smudged markings; and identifies firearms and compares bullets, tool markings, and foot prints.'
Key Figure in Criminalistics: Paul. L. Kirk Paul Leland Kirk was Emeritus Professor of Criminalistics at the University of California, Berkeley (UCB). During his tenure, Kirk was instrumental in establishing criminalistics as an academic discipline. Kirk's interest in the application of scientific knowledge within a criminal investigation led to the publication of the landmark text Crime Investigation Physical Evidence and the Police Laboratory in 1953.
Paul Leland Kirk died on the 5th of June 1970 the following passage is taken from his obituary.
If he wished to be remembered for any one thing, it would be for his contribution to criminalistics. Indeed, the very term “criminalistics” has come into usage largely through his efforts, and it was he who established the first academic program in criminalistics in the United States. He brought to the profession an insight and scientific rigor rarely seen before his time.