Sean Barlow is a character who appears in Red John's Rules. He's a very smart Irish psychic, an acquiantance of Patrick Jane and former friend of Alex Jane; he said that his grandfather and Patrick's great-grandfather moved from Ireland to the USA together. Barlow, who claims to be a real clairvoyant, said that Alex was a "wicked man" who abused the faith of trustful people, knowing that he and his family didn't have real psychic powers. Furthermore, he claims that Red John has real powers.