can dna be obtained from fingerprints
Many factors affect the ability of obtaining DNA profile from fingerprints. The length of time the finger was held on the surface is an important factor. It was observed that if a person touched the surface for a minimum of 60 seconds, then DNA could be obtained.
Flakes of skin, drops of blood, hair, and saliva all contain DNA that can be used to identify us. In fact, the study of forensics, commonly used by police departments and prosecutors around the world, frequently relies upon these small bits of shed DNA to link criminals to the crimes they commit.