I don't know anything about this guy specifically, but he looks exactly like every other faith healer out there who preys on people. People with nebulous issues like "chronic back pain" can gain significant relief just from the placebo effect, only for the pain to return days later. For the more serious cases--people confined to wheelchairs or needing crutches--they're usually (always?) fakes planted in the crowd.
Charlatans like Benny Hinn can get caught defrauding people then turn up a year later and still rake in millions of dollars.
Show me a faith healer who can restore an amputated limb and I'll be impressed.