8/10/2023 0 Comments Impression evidence examples![]() ![]() ![]() Bodziak (2000) defines casting as, “the filling of a three-dimensional footwear impression with a material that will acquire and retain the characteristics that were left in that impression by the footwear”. To this day, casting these type of impressions is regarded the most suitable method for collection of the evidence. ![]() Three-dimensional impressions require more robust methods for collection, due to the depth of the impression and fragile surface characteristics. Adhesive lifters and gel lifters can be used for lifting two-dimensional impressions from smooth and textured surfaces, respectively, while electrostatic dust lifters are useful for lifting two-dimensional impressions in dust and on dry surfaces, by means of an electric charge. However, on the contrary, if the impression is located on a surface that is immovable and cannot be removed from the scene, certain techniques are applied for efficient collection of the impression for further analysis. Further, if the impression is on a movable surface, the entire surface is collected for further analysis in a laboratory. Photographing the impression at the crime scene is one of the most effective methods of documenting the impression in situ, and establishing a permanent record of the impression. Impression evidence is generally transient in nature and hence adequate steps must be taken to ensure efficient collection, documentation and preservation of this evidence. Collection and enhancement of footwear impression evidence ![]()
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