Chain of Custody

• What refers to the documentation of who had possession of the evidence, from the time of collection to the time of analysis and beyond?

  Chain of Custody
• What is the goal of chain of custody?

  to maintain the integrity of the evidence
• Give tests that requires chain of custody?

  Drug testing, blood alcohol samples, and paternity testing
• Drug testing: for medical, legal, and employment purposes
• What sample is used for drug testing because of ease of collection and longer-life of substances?

  Urine
• Blood alcohol samples: usually ordered for purposes related to TREATMENT but could also be used for industrial or job-related purposes.
• In cleansing the site for blood alcohol samples, what is used?

  soap and water OR non-alcoholic antiseptic solution
• Give example of non-alcoholic antiseptic solution?

  benzalkonium chloride-zephiran chloride
• What color of top is used for blood alcohol specimen?

  gray
• What antiglycolitic agent preserves glucose for 3 days?


  sodium fluoride
• What antiglycolitic agent preserves glucose for 24 days?

  Lithium iodoacetate
• Potassium oxalate: ACG of sodium fluoride
• Lithium heparin: ACG of lithium iodoacetate
• Paternity testing: Performed to determine the probability that a specific individual fathered a particular child
• Who are tested for paternity testing?

  mother, child, and the alleged father
• what type of samples are used for paternity testing?

  blood or buccal swabs