Shon speaks the truth

Shon announces before everyone assembled that Karn was the one who had killed the entire tribal gang but no one agrees to believe him. Just then, Shakuni enters the hall and mocks Shon. Dhritarashtra does not let the matter pass and asks Karn to confirm his brother's statement. Karn joins his brother and states that he had slain the tribals. But when everyone assembled in the hall learns that Karn and his family belong to a low class, they begin to laugh at Karn. Will Karn be forced to display his skills in order to prove himself to Shakuni and Dhritarashtra?