METHOD FOR DEVELOPING AND EXTRACTING BIOLOGICAL TRACE EVIDENCE

摘要

A method for developing and extracting biological trace evidence comprising the following steps: (1) using a biological fluorescent development reagent to process a porous carrier so as to develop biological trace evidence on the porous carrier, wherein the biological fluorescent development reagent is formed from a raw material formulation comprising the following components, in percent by weight: 0.01-0.5% of indolindione; 4-10% of ethylacetate; 0.5-1.5% of glycerol; 5-15.5% of absolute alcohol; and 73.5-90% of petroleum ether; and (2) extracting the biological trace evidence to obtain DNA information of the biological trace evidence. In the method, a biological fluorescent development reagent is used to develop biological trace evidence, and then DNA information of the biological trace evidence is extracted. Next, comparison and filtering are formed on the extracted DNA information to find out a suspect. For crime investigators who need to extract DNA evidence, the method enables targeted extraction of physical evidence, thereby greatly reducing workload. Moreover, the method can be used to develop and extract obscure trace evidence, such as a fingerprint on a garment, thereby greatly improving investigation efficiency.