Without a demo there can be no perma ban as there is no real proof of these accusations. I would recommend however that you keep a close eye on him and next time get the required demo of him ghosting or benefiting from ghosting so that he can be perma baned.

For now he is getting a second chance, he will be unbanned only when I get around to it because I do not fully believe that he is totally clean. I know you guys and trust your judgment but we all still need to get demos for the perma ban unless I can see from the stats or logs.