An 18 year-old guy had been having speech difficulties for the last 10 years. I asked him whether he could remember any traumatic event that happened around the time when this problem began.
He said that his father was a drunkard and would get angry and try to burn him. I asked my interpreter to lead him in a prayer to forgive his father and renounce the spirit of unforgiveness, anger, etc. Then I asked him to check his speech. It was perfect.