Crime Scene Investigation Report

Introduction: After further investigation of the crime scene, large glass pieces were found on the floor of the utility closet which appeared to come from the lower part of the window in the same room. The glass appears to have been broken from the outside, but there is know for sure without further investigation. The evidence can be found by identifying the type of glass and then reconstructing the glass window so that the radial fracture can be examined to determine the point of original impact.
Materials:
The materials used are listed below:
-A flashlight emitting UV light
-The glass fragments on the floor
-The window pane in which the glass appears to be from
-Gloves
-Magnifying glass
-Microscope with hot stage furnace
-Liquid with specific refracting index
-Calculator
-Googles
Procedure to examine the evidence:
1. After the scene has been secured, each individual room is …show more content…
This was determined by identifying the type of glass and reconstructing the glass window in order to view the radial fracture. The UV flashlight caused the glass to fluoresce, thus indicating that the glass type was float glass. The float glass fragments were reconstructed to reveal the radial fracture. The radial fracture is a line that extends outward from the point of impact that breaks first on the side opposite of the force. The top of the glass formed a right angle with the conchoidal fracture lines and then curve down towards the bottom of the glass. This pattern suggests that the glass was broken from outside of the house. After dipping the glass in the liquid and observing the Becke line, the refractive index was calculated to be 1.42. This refractive index can be used to distinguish different types of glass from each other. This refractive index can help when trying to identify glass fragments found on a suspects clothing of on a victims