Chico Xavier, the fraud
Well, isn't it obvious? Invariably, any supernatural claims are a load of bull. Don't be fooled, such things do not exist. Someone like Chico Xavier, who claims to listen to "spirits" or whatever, has to be swindling suckers or acting on a delusion. Or doing both at once. Here's a nice website that compiles some very damning evidence against him.
• http://obraspsicografadas.haaan.com/ (in portuguese only)