Describe in detail a series of tests that a forensic drug chemist would conduct in order to identify a white powder as containing cocaine with an approximate purity of 80%.
Describe the proper collection and preservation of paint evidence from an automobile suspected of being involved in a hit-and-run incident. Paint that is foreign to the suspect automobile is observed on the hood.
Discuss the proper collection of evidence at the origin of a fire that is suspected of having been started with gasoline. Describe the proper submission of controls for laboratory examination.