The Bible teaches that any genuine believer can cast out demons. I've done it before, and I know others that have too. Feel free to look me up on Facebook. My name is Cheryl Fritz. If you punch in my name under a Facebook search I think I'm the first Cheryl Fritz listed. I have long blond hair. Just send me a friend request, and we'll talk more.
Mark 16:17 (New King James Version)
17 And these signs will follow THOSE WHO BELIEVE: In My name they will cast out demons; they will speak with new tongues;
Luke 10:17-19 (New King James Version)
17 Then the seventy[a] returned with joy, saying, “Lord, even the demons are subject to us in Your name.”
18 And He said to them, “I saw Satan fall like lightning from heaven. 19 Behold, I give you the authority to trample on serpents and scorpions, and over all the power of the enemy, and nothing shall by any means hurt you.
Matthew 10:7-8 (New King James Version)
7 And as you go, preach, saying, ‘The kingdom of heaven is at hand.’ 8 Heal the sick, cleanse the lepers, raise the dead,[a] cast out demons. Freely you have received, freely give.