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.
The ability to obtain reliable DNA profiles from fingerprints depends on the number of nucleated cells collected from the fingerprints. The more cells there are in a stain or on a surface, the more DNA there will be. In theory, all you need is one nucleated cell to obtain DNA.