God did not create evil; He created the possibility of evil by giving us freedom. Evil is nothing more than the corruption of that which intended for good. It is logically impossible for Him to create a world in which people have genuine freedom yet without the potential to do that which is depraved or even evil. If God had created us without freedom, we would have a world without humans and a world without love.
Richard E. Simmons III, Reflections on the Existence of God, pg. 52