Poison Letters Sent By Elvis Impersonator

Kevin Curtis is an Elvis impersonator and now is charged as the sender of poison letters to President Obama as well as a US Senator and a Mississippi Judge. Curtis is now in custody in Oxford, Mississippi where he his being held without bond as he is considered a danger to the community. He  is reported to have been suffering from mental illness for many years. What could make an Elvis impersonator go off the rails like this is a mystery.