Forensics fingerprint ELO Flashcards
Arch
No deltas
5% of people have arched fingerprints
Plain arch
Ridges enter on one side and exit on the other side
Tented arch
Similar to plain arch but has spike in center
Loops
Have 1 delta
Most common
Ulnar loop
Ulna bone
Radial loop
Radius bone
Whorls
One ridge that makes a complete circle
Contains 2 deltas
Central pocket whorl
Draw a line between the two deltas if none of the center core touches the line its a double pocket whorl
Double loop whorl
Made up of any two loops combined into one print
Accidental whorls
Contain 2 or more patterns
Can contain 2 or more deltas
Are fingerprints individual or class?
individual
Latent prints
Not visible to the naked eye
Body oils/persperation
Visible prints
When fingers touch a surface after the ridges have been in contact with colored material
Plastic prints
Ridge impressions left on a soft material such as putty, wax, dust, and soap
Usually distinct and visible to the naked eye