What should be done with latent prints etched in metal?

When latent prints are found etched in metal, the recommended procedure is to photograph them as they appear. This step is crucial because once a latent print is etched, it is often challenging to improve or develop further without risking the quality of the impression.

Photographing the print allows for the permanent documentation of the evidence in its original state. This is particularly important in forensic investigations where the integrity and authenticity of evidence need to be maintained for legal purposes. The photograph serves as a record for analysis, comparison, and potential court presentation, as it captures the details of the print at the time of discovery.

Other methods, such as further development with powders, may not be suitable because they may disrupt or alter the etched impression. Cleaning the metal surface prior to photography is not advisable either, as this could damage the latent print. Therefore, capturing a clear photograph of the etched print allows investigators to preserve the evidence while minimizing the risk of contamination or loss of detail.