Macro Etching

Sir Jayger gave us a lecture on Physical Identification particularly in Macro Etching. Physical Identification includes tool marks, macro etching, molding & casting, hair comparison/identification, glass fracture and fingerprint but fingerprint has a separate division because it is a wide coverage. He can only explain to us Macro Etching because the others will be explain to us by our supervisor. All that are include in the Physical Identification Division are perform by a chemist or a chemical engineer but Sir Jayger as a licensed criminologist was authorized by Ma'am Vicky to do the Macro Etching or the Examination of the engine number and chassis number of motor vehicles if there is a sign of alternation or tampering, because it uses only a small amount of chemicals and also the lack of chemist and chemical engineers.