CSI for animals: Forensic vets battle pet abuse, neglect

Dr. Laura Niestat, one of three veterinarians with the American Society for the Prevention of Cruelty to Animals (ASPCA ) forensic unit, holds photo evidence of a dog missing layers of skin from a tight collar, Thursday April 7, 2016, in New York. The New York based ASPCA unit works with the New York Police Department to capture evidence and punish animal abusers. (AP Photo/Bebeto Matthews)