Answers
It seemed as though someone was going around the town and poisoning dogs. This type of poison was being used to enhance a dog’s ability to fight. The after-effect of the drug was that it made the dogs very sick and they would usually die shortly after taking it.
The stains that were on the dog that James found were exactly the same type of stains found on all the other dogs they found over the last few weeks. They wanted to find the person that was responsible for this and bring him to justice. The police believed that they finally found their man.