Which specimens are typically collected for toxicology in sexual assault investigations?

Which specimens are typically collected for toxicology in sexual assault investigations?

• A. Urine
• B. Blood and urine
• C. Hair and nails
• D. Saliva and tears

Answer: (B)

In sexual assault toxicology, the goal is to detect substances that could have impaired the victim or facilitated the assault. The standard approach is to collect both blood and urine because they offer complementary detection windows: blood shows what's present in the bloodstream at the time of collection, while urine often reflects drugs that were metabolized and excreted earlier, expanding the window for detecting many substances. Hair and nails can reveal longer-term exposure but don’t indicate what was present during or immediately after the incident, and they aren’t useful for acute intoxication testing. Saliva can be useful for some drugs but isn’t as comprehensive or reliable across a wide range of substances. Thus, blood and urine together provide the most reliable and timely toxicology information in these investigations.

In sexual assault toxicology, the goal is to detect substances that could have impaired the victim or facilitated the assault. The standard approach is to collect both blood and urine because they offer complementary detection windows: blood shows what's present in the bloodstream at the time of collection, while urine often reflects drugs that were metabolized and excreted earlier, expanding the window for detecting many substances. Hair and nails can reveal longer-term exposure but don’t indicate what was present during or immediately after the incident, and they aren’t useful for acute intoxication testing. Saliva can be useful for some drugs but isn’t as comprehensive or reliable across a wide range of substances. Thus, blood and urine together provide the most reliable and timely toxicology information in these investigations.