A crime lab profession requires different skills and knowledge to acquire and apply modern technologies and investigate crime. It is possible to distinguish two subcategories in the crime lab profession: generalists, and those who specialize in one area. The main responsibilities of a crime lab professional are the analyses of evidence and advice on further investigation, evidence collection and reporting, interpretation of real and hypothetical situations, cross-examination, and synthesis of data. The main duties of crime lab professionals are latent print examinations , firearms, and other evidence examinations, controlled substance examinations and DNA testing, etc. (Bureau of Forensic Services, 2007). Crime scene analysis, because of its subjective nature, presents a definite challenge in developing a concept of how to test crime scenes. The crime lab professionals after considerable thought and discussion come up with strategies in dealing with external proficiency tests for crime scene investigators covering. Attending the scene of the crime, crime lab professionals make an initial assessment of it. They will secure the scene to an extent based on the information available at the time. A crime scene investigator or a team of crime scene investigators who will undertake the crime scene investigation is normally accompanied by a crime lab professional. The size of the crime scenes dictates the number of resources allocated to the particular incident. In this case, a crime lab profession requires on-the-spot assessment, decision-making, and sometimes an innovative approach. Provided this is done applying scientific principles, and fully recorded, this should meet quality standards. It can also be expected that there will be an increased need for, and demand for, proficiency tests for field-testing (Langford, 2005). In recent years, special attention is given to DNA testing and analysis. About the identification of persons, fingerprint comparisons and DNA profiles are the most likely to establish the individuality and therefore the identity of a person. A crime lab professional identifies and examines class characteristics and similarity of those features that group things into a common class requiring further examination to see if there are indicators of similarity which allow screening before a more detailed examination is made. For instance, all questioned documents involved in a particular investigation are submitted to the laboratory for examination (Langford, 2005). This is important since questioned documents are identified by a comparison of similarities, plus an absence of divergences or dissimilarities. To make an identification, sufficient handwriting, typewriting, or other evidence must be available on which to base an opinion. This means that all questioned material is needed, as well as sufficient exemplars or known specimens (Bureau of Forensic Services, 2007). The main rewards of this career choice would be prestige and personal accomplishments. Career choice gives primary emphasis to the personality characteristics that predispose an individual to seek a career of a given type. There will be greater job satisfaction and fulfillment and a lesser tendency to change jobs throughout the career. These various orientations, including occupational values, have bee