Forensic science deals with applying science to the law. Based on the principle that ‘every contact leaves a trace’, forensic scientists are mainly concerned with examining contact trace material associated with crimes. The work of a forensic scientist will offer potential evidence to link a suspect with the scene of the crime, the victim, or the weapon. This evidence will be impartial scientific evidence for use in courts of law to support the prosecution or defence in criminal and civil investigations. The role of a forensic scientist is a highly scientific role, which often involves detailed, painstaking work. Typical work activities include: analysing samples, such as hair, body fluids, glass, paint and drugs, in the laboratory; applying various techniques, as appropriate, for example scanning electron microscopy, genetic fingerprinting etc.; sifting evidence; attending and examining scenes of crimes; recording findings and collecting trace evidence from scenes of crimes or accidents; inputting relevant data into computer programs; presenting results of work; justifying findings under cross-examination in courts of law; researching and developing new techniques; co-ordinating with outside agencies; analysing and interpreting results and computer data; liaising with police to establish forensic strategies; writing detailed reports for court; and instructing on procedures for cases. The job activities of a forensic scientist will greatly depend on the area of forensics in which he/she works, which are: chemistry – connected to crimes against property, such as burglary and arson; biology – connected to crimes against people, such as murder, assault, and rape; and drugs and toxicology.