The first reason that he is guilty. He breaks the laws. He went into people houses and steal their gifts. He went into the peoples houses and ate all of their food. Also he burnt down the Christmas tree. When there was a small person driving, the Grinch stole their car and drove away. And that is how he broke the laws.
The second reason that he is guilty. He is mean. He mocked Cindy Loo and spoke roughly to her. Next, when max was dancing and the Grinch saw him he thrown him into the snow. Also, He used