Law enforcement sometimes uses people with clairvoyance to help solve crimes. Is this wrong?

If someone is supernaturally given information he has not sought out, it is generally permissible to use it for the benefit of others, assuming there is just cause to do so (e.g., solving a crime). But if someone is deliberately seeking out occult contact with the supernatural realm—or hiring someone else to do it—that is forbidden by the Church (CCC 2116). In this case, that would mean that law enforcement agencies legitimately could use information brought to them by someone who claims to have been given the information through supernatural means, but, from a moral standpoint, such agencies should not hire “psychic detectives” to seek out information through occult means.