Rocephin is part of a class of drugs called cephalosporins. It prevents bacteria's ability to make and maintain their cell wall. Without a cell wall, bacteria are vulnerable and ultimately perish.
Criminalistics is one of many divisions in the field of forensic science. Forensic science includes forensic pathology, odontology, entomology, engineering, criminology, and other disciplines. All of these are specialized sections in forensic science.
The criminalist uses a battery of analytical tools and their knowledge of chemistry to identify controlled substances in powders, pills and liquids and body fluids. A criminalist may be called to a clandestine laboratory by investigators, where illegal drugs are produced.