I think we have all seen cases where psychics get involved and make a mess of things by leading LE/loved ones in the wrong direction. If not flat out taking advantage of the missing person's family members.
Remember Sylvia Browne telling Amanda Berry's mom that Amanda was dead, when in reality, Amanda was alive and being held captive by Ariel Castro? Amanda's mom died before Amanda escaped, so she went to her grave thinking her daughter was dead. I would be interested to see statistics on how often psychics actually help solve cases. If I have some down time today at work, I will look into it and see what I can come up with.