Crime Scene Fingerprint Chart

[Music] every single aspect of our life is influenced by chemistry even part that we don't really understand my name is Gloria prony and I'm an associate professor at John Jay College my research field is in chemistry applied to forensic science we are trying to develop a new fingerprint detection reagent fingerprint our the mark left by our hands in particularly the tip of our fingers some of the fingerprint that they can be detected in a very non-destructive way putting some black powder which is also magnetic and it get attracted to the fingerprint and as you can see we quickly get it a fingerprint in the filter paper latent fingerprints our fingerprint that you cannot see so you know that they are there but you cannot see them so you need to find a way of developing and making the visual for everybody Nygren is used to detect a latent fingerprint neither works very well it gives a v