What technology can investigators use to detect latent fingerprints without chemicals or powder treatments?

RUVIS, or Reflectance Ultraviolet Imaging System, is a specialized technology used by forensic investigators to visualize latent fingerprints without the need for chemical or powder treatments. It works by utilizing ultraviolet light to enhance the contrast between the latent prints and the background surface on which they are found. This method is particularly valuable because it minimizes the risk of damaging the evidence and eliminates the potential for introducing foreign substances that could interfere with subsequent analyses.

While other technologies mentioned, such as AFIS (Automated Fingerprint Identification System), digital imaging, and UV light have their applications in forensics, they do not directly relate to the detection of latent prints without additional treatments. AFIS is primarily used for matching fingerprints against databases rather than for the initial discovery of latent prints. Digital imaging refers to capturing and processing images but often relies on other techniques for enhancing prints. UV light could potentially aid in visualization, but RUVIS is distinct in its specific design and purpose for this task, making it the most suitable option for detecting latent fingerprints directly.