Robbery on the Orient Express

Fingerprints

for our project , we have studied finger prints. We have seen several fingerprint classes like arches, loops , whorls

  

This picture represents arches. In an arch pattern, the ridges enter from one side, make a rise in the center and exist primarily on the opposite side.
 

 This picture represents loops: 

In a loop pattern, the ridges enter from either side,re-curve, and pass out or bend to pass out side they entered.

The picture represents the whorls

After that, we printed our fingerprints on tape and after that we place it on  paper. 
 fingerprint characterization :

.  The different types of fingerprints at crime scenes :

      * Patent prints: prints easily seen such as left by blood or     paint 

      * Plastic prints : found as impressions on wax or grease

      * Latent prints : not visible to the naked eye

The fingerprint ridge characteristics :

Anaïs et emma