Praise be to Allaah.
Undoubtedly this man is a practitioner of witchcraft or magic, and this is the work of the shayaateen (devils), because this is beyond the capabilities of human beings. No one knows the unseen except Allaah, and revelation comes only to the Messengers – and Muhammad (peace and blessings of Allaah be upon him) was the Seal of the Prophets and there is no Prophet after him. No doubt the Shaytaan appears to fortune-tellers and describes the thieves to them, and tells them where stolen goods are, whether this is seen in this dish of water or in some other way. It is not permissible to ask these people anything or to believe them. “Whoever comes to a fortune-teller and believes him has disbelieved in what was revealed to Muhammad (peace and blessings of Allaah be upon him”. (Saheeh – narrated by Ahmad, 2/408; Abu Dawood, 3904; al-Tirmidhi, 135; Ibn Maajah, 639; al-Haakim, 1/8). On this basis it is not permissible to appoint him to lead you in prayer, or to pray behind him, or to keep in touch with him in good times and in bad, or to give him anything even if he is in need, until and unless he repents. And Allaah knows best.