ABSTRACT
As we have seen in Chapter 3, background information such as transfer and persistence is essential to evaluate glass evidence, and its importance cannot be overstated. It is very important that the glass examiner be aware of the data that have been published on the subject. If a search is performed, this data is necessary to form an opinion on the value of evidence. Transfer and persistence probabilities are very difficult for the expert to assess as they may depend on various factors. The amount of glass expected to be recovered is reported to be influenced by the type and thickness of the glass, the distance at which the window has been broken, the garments of the suspect, the time elapsed between the incident and the arrest, and the activities of the suspect between the offense and the arrest. It may also be affected by other variables such as the size of the window, whether or not entry was gained to the premises, or the weather at the time of the incident.
