Crime Scene (Power Point)

Lasers.a. Technique used to develop prints that could not have been developedthrough the use of powder, iodine, ninhydrin solution, silver nitrate, or superglue fuming.b. The laser procedure is a clean, relatively easy method to develop prints, andpretreatment of the specimen is not required.c. Unlike with the ninhydrin method, the age of the print is not important.d. It is generally used before other methods are employed because noalteration of the evidence is required.e. In this process, an expanded laser beam, which is used to luminesce certainproperties of perspiration, body oils, or other foreign substances found on alatent print.f. These types of lasers are currently used: argon ion laser, copper vapor laser,and neo dynium. (Yag lasex).g. Special eye protection must be worn, due to the intensity of the laser light.