This article is devoted to the study of the circumstances of two crimes that occurred in Paris in 1391 and 1407. The study led to the conclusion that the Duke of Burgundy, Jean the Fearless, did not have sufficient grounds for killing the brother of King Charles VI, Louis of Orleans, since the day before they had reconciled with each other friend. The king's lack of desire to punish the Duke of Burgundy also testifies in favor of the fact that he did not consider him guilty. But the injured party - members of the House of Orleans - considered this a denial of justice, which led to a civil war.