On Odor Evidence

Odor evidence mainly refers to the specific material odor related to the development of the case or other facts to be proved,which includes the odor of various types of material objects themselves,the odor after material deterioration or mixing,and human body odor.The identification conclusion of police dogs and the conclusion of gas chromatogram are related to the conclusion of odor evidence.The collection process of odor evidence is legitimate,and the environment where the odor evidence is located and the protection requirements of the scene are related in form.The odor evidence has formal objectiveness.It’s existence and storage forms has formal objectivity.In terms of the correlation of evidence,odor evidence has a substantial correlation with the facts to be proved,but this substantial correlation is indirect and fragmented,which cannot directly prove the complete facts to be proved.It belongs to a kind of evidence to be strengthened,which,combined with the identification opinion,has certain proving power.In the case of successful application of odor evidence,its status is also a kind of evidence to be strengthened,and the proof function of odor evidence needs to be supplemented or proved by other evidence.In the cases of unsuccessful use of odor evidence,the main reasons are that the odor evidence is not reinforced by other strong evidence,the evidence alone cannot be determined,and the odor evidence is excluded due to the influence of the application rules of criminal procedure such as "suspected crime never".The advancement of science and technology will affect the accuracy and reliability of odor evidence,which is closely related to the development of odor evidence.Good scientific and technical means are matched with the standard forensics process,which makes the odor evidence more convincing and evidentiary in the objectivity,especially in the content authenticity.The designation technology of police dog is more scientific,as well as the progress of the development of the instrument to identify human odor,are the strong support of the odor evidence as one of the scientific evidence.Technology ensures quality of evidence.The combination of police dog and instrument identification is one of the development directions of odor evidence in the future.For the use of new scientific evidence,the judge should break with the general understanding of thinking,the use of professional vision and professional thinking on the relevant issues.