Extraction and Inspection Methods of Gunshot Residue

Gunshot residues are the most important evidence for the criminal cases related with guns. Gunshot residues can be divided into organic gunshot residues and inorganic gunshot residues mainly from the unburnt or partially burnt propellant and primer. Investigators use different extraction methods for different places and different inspection methods. In this paper the advantages and disadvantages of different inspection methods for gunshot residues are discussed.