False Impressions

Upon arrival, a quick note of time, weather conditions, temperature, and ambient light would be annotated. Before entering the structure an exterior survey would be conducted to see if any obvious evidence was apparent. Evidence such as open, broken windows, damaged doors, footprints, tire impressions and other evidence are key outdoor evidence. All evidence identified would be recorded taking analytical notes. Noting the negative factors (dark, no street light, possible rain, cloud cover, cold temperature), securing and preserving fragile evidence in poor weather conditions would be first and foremost and if possible, protected until the following day. Daylight has proven to be a better source of light than artificial light for detecting evidence. Utilizing portable …show more content…
Maintaining a distance of 30 to 38 inches from lens to the impression is acceptable. Using commercial rulers designed for footwear or tire impressions and placing the ruler parallel to, and on the same plane as the impression is the best method utilized. The impressions would be photographed using oblique lighting at a 20 to 45-degree angle. Using an artificial light to determine the best angle and shadowing effect would produce the best contrast in the impression. Once indoors, we would make a visual survey of the actual room in which the incident reportedly took place. Again information is gathered to prevent the destruction of valuable and fragile evidence such as shoeprints, trace evidence. We would use the link method in which all apparent actions associated with the crime took place. This method is usually marked by the presence of physical evidence. This would include the point of entry, the location of the crime, areas where a subject may have traveled, and the point of egress. We would photograph the indoors with available light; incandescent fluorescent, electronic flash, or a combination a combination