Which of the following items would not require a special fingerprint press and can be processed at the scene?

• A. Soda can
• B. Metal key
• C. Glass pane
• D. Ceramic coffee cup

Answer: (A)

Latent prints on nonporous, smooth surfaces can usually be developed and lifted at the scene with standard powder and tape, without needing specialized equipment. A soda can is a classic example of a surface that accepts dusting powders readily and can be lifted directly with basic techniques. It doesn’t require any extra device or pressing method beyond routine field processing, which is why it’s the best choice for processing at the scene. The other items listed are also nonporous and can be processed, but the soda can best exemplifies the straightforward, at-scene processing without special equipment.