PA security forces are holding a Jewish man - Dr. David Marcea, a former resident of Elon Moreh - on suspicion that he was involved in Israel\'s killing of a leading Hamas terrorist last week in Shechem. Dr. Marcea, 50, has been living in Shechem with his mother, who is married to an Arab. His half-brother and brother-in-law, an Israeli-Arab from Jaffa, were also arrested by the PA.