Ok moms I have a question if you seen a group of kids starting to jump another kid while you was…

Ok moms I have a question if you seen a group of kids starting to jump another kid while you was driving by and witness it starting would you say something? Well I just seen 3 kids beating up one boy when their bus pulled off so I stopped my car and asked them what was wrong with them and they tried to say they was playing. But I seen it and they were not so I told them I didn't care if they was playing or not that it was ignorant and another man started to get out his car to say something to them as well. I didn't kno what to say I wanted to follow them to their home and tell their parents especially bc the one claimed to be his brother