What happened between Emmett till and carolyn Bryant which in flamed ron Bryant?

emmitt till walked out of the store and muttered "bye, baby" to a white woman. For this they brutally murdered the boy

Actually they don't know what he did. Some say he wolf whistled at her, and other say he grabbed her by the waist and asked her on a date or muttered "bye, baby" like you said. But Carolyn Bryant says he grabbed her by the waist and asked her on a date. So no one knows what he did, but Emmett Till knew what he did once, but they shouldn't hav brutally murdered him like that, but i understand it was in the 50's where white people(not a racist remark) lynched African Americans.