Which item should be transported to the lab for analysis?

• A. A glass with a visible bloody handprint
• B. A stolen credit card
• C. A vehicle
• D. A wallet

Answer: (A)

Biological evidence from the scene is the most informative for identifying who was involved. A glass with a visible bloody handprint contains bodily material that can yield DNA, telling you who left the sample and potentially linking a suspect to the scene. DNA analysis can confirm human origin, determine a profile, and sometimes connect to a database match, which is a powerful way to establish identity or presence at the crime. The other items might be useful for different lines of inquiry, but they don’t provide the same direct, lab-ready biological information. A stolen credit card could be fingerprinted or traced through transactions, and a vehicle or wallet might hold trace evidence, but none offers the immediate, identity-establishing potential of blood for DNA analysis.