Which type of fingerprint impression is most commonly referred to as latent at a crime scene?

Latent fingerprints are the most commonly referenced type of fingerprint impressions found at a crime scene. They are called "latent" because they are not visible to the naked eye and must be developed using various techniques. This development often involves treating the surface with powders, chemicals, or other methods to reveal the hidden impressions left by the oils and sweat on a person's skin.

Plastic fingerprints, in contrast, are three-dimensional impressions left in soft materials like wax or clay, and patent fingerprints are visible prints made by the transfer of foreign substances, such as ink or blood, onto a surface. While both types are significant in forensic analysis, latent fingerprints are the primary focus since they represent the largest number of prints collected in crime scene investigations. Understanding the differences between these types helps forensic analysts determine the best methods for evidence collection and analysis at a crime scene.