Losing faith in humanity... 😤

So I saw this boy in class making fun of a kid with Down syndrome. I let it go because I wanted to make sure that's what he was doing. The next day he does it again, I'm infuriated because I know other people who have the syndrome and I am very close with one of them. So I got sick of it and told one of my peers who helps out the special education class. Am I a snitch or would you guys have done the same thing?!?😞😑