Intentional dog poisoning

This is so tragic and horrible that people would intentionally poison dogs like that. I lived in a small town and no one would do that. But people would let their dogs run around and sometimes people would hit them with their cars and keep driving. It was never determined if the people hit them on purpose or on accident but before I moved away, people had started to keep their dogs inside when they were at school or work. Other than that, most dogs would lick up antifreeze during the fall and winter and die. But that was never intensional.