type or classification of physical evidence dna fingerprints

 Select one type or classification of physical evidence (e.g., fingerprints, tire tracks, DNA, etc.) and discuss the concepts and various methods used to search for, identify, collect, process, preserve, and maintain the chain of custody of evidence collected for use in a subsequent criminal prosecution. Utilize the methods you find in the readings and research that are best practices and satisfy the legal requirements for submission at a trial.