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Different techniques are used to collect fingerprints at crime scenes from "summary" of Forensic Fingerprints by Max M. Houck
Fingerprints are one of the most common types of physical evidence found at crime scenes. They are unique to each individual and can be used to identify suspects or link them to a crime. Collecting fingerprints at crime scenes is a crucial step in the investigation process, as they can provide valuable information about who was present at the scene of the crime. Various techniques are used to collect fingerprints at crime scenes, depending on the surface on which the prints are found. One common method is dusting for fingerprints, which involves using a fine powder to make the ridge patterns of the fingerprint visible. This technique is often used on smooth surfaces such as glass or metal. Another technique is using chemical reagents to develop latent fingerprints, which are not immediately visible to the naked eye. These reagents react with the oils and sweat present in the fingerprint, making it visible under certain lighting con...
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