AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
![]() The Analysis can be no better than the sample analyzed. Once handwriting available on a photograph allegedly written on a wall was compared with the specimen written on paper. It emphasizes the necessity of providing samples and specimens for comparisons with the questioned items.Ī questioned hair can only be compared to another hair sample, same with tool marks, bite marks, tire marks, etc.Ī specimen is obtained by writing on the same wall, at the same height, and with the same instrument and then photographed. “Only the likes can be compared” is the principle of comparison. Samples degrade with time, Bodies decompose, tire tracks & bite marks fade, the firearm barrel loosens, metal objects rust, etc. ![]() ![]() The weather, the vegetable growth, and the living beings make extensive changes in comparatively short periods. The scene of occurrence undergoes rapid changes. If he is not apprehended in time, he becomes unrecognizable. The criminal undergoes progressive changes. Different types of objects may take different time spans. “Change is inevitable”, this also applies to objects. Likewise, the criminal or his instruments pick up traces from the same contact. Commonly known as Edmond Locard’s maxim on Interchange.Īccording to the principle, when a criminal or his instruments of crime come in contact with the victim or the objects surrounding him, they leave traces. It was first enunciated by the French scientist, Edmond Locard. Principle of ExchangeĬontact exchange traces are the principle of exchange. The grains of sand or common salt, seeds of plants, or twins look exactly alike. This principle at first sight appears to be contrary to common beliefs and observations. If the same is established, it connects the crime and the criminal. Law of IndividualityĪnything and everything involved in a crime have individuality. The Laws and Principles of all the natural sciences are the bases of Forensic Science.Įvery object, natural or man-made, has an individuality that is not duplicated in any other object. Sources:” A Closer Look On Forensic Science“ written by Archana Singh Introductionįorensic Science is the science that has developed its own Laws and Principles.
0 Comments
Read More
Leave a Reply. |