Charvak

Charvak was a Rakshas in Hindu mythology. He lived in the Mahabharata era and was a friend of Duryodhan. When the Mahabharata War was over and the victorious Pandavas entered Hastinapur in triumph, they came across Charvak in disguise of a Brahman. The Brahman reproached Yudhishthir for his crimes. However, he was detected and was killed by the real Brahmans of the court for his act of impersonation.