During another internet search i found this.
Isaiah 45:7 and Deuteronomy 30:15, however, pose a serious theological problem for Christians who maintain that God did not create Satan, the angel of evil. According to Christian doctrine,
Satan was the highest ranking angel who, through his own act of spiritual defiance and outright disobedience, became the chief adversary and slanderer of God and the embodiment of evil in this world. In Christian theology God never created evil; He is only the author of righteousness and perfection, as you maintained in your question. Therefore, God could never create something as sinister as the devil himself. Rather, Satan’s unyielding wickedness is the result of his own spiritual rebellion.
found on
http://www.outreachjudaism.org/satan.html
My main problem with this is that it doesn't actually give any references to any scriptures so there is still no real proof, it's just an opinion.