Canine Codis, or the Canine Combined DNA Index System, is a DNA database for dogs that scientists hope will help them trace down criminals involved in dogfights and abuse.
Dogs, like people, have bloodlines that can be traced fairly easily. By creating a large database of DNA, it will be much easier to link dogs to their owners and the dogfighting sites they may have been taken to.
It’s not that much different from what forensic scientists do for a human criminal trial. DNA at a crime scene is collected and compared with an individual’s DNA to see if there’s a match.