DNA Test Helps Enforce Pet Clean Up Policy SAN DIEGO - The same DNA technology that has solved cold case murders is now being used to crack down on a whole new class of criminals: dog owners who don't clean up after their pets. "Unfortunately, people leave surprises in my yard, but I always carry plastic bags, so I can clean up those surprises," said dog owner Ted Stevens. Now, BioPet Vet Lab ,a company in Knoxville, Tenn., has developed technology that is says can identify the dogs that leave unwelcome calling cards on neighborhood lawns. The system, called Pooprints,...