Philippine President Benigno S. Aquino III vowed on Tuesday that justice will be served for the murder of an Italian priest. Aquino told reporters that authorities were now following the leads as to those responsible for the killing of Father Fausto Tentorio, who was shot dead inside a church in North Cotabato Monday morning. \"They (investigators) have the leads being explored. But at this point in time we are not prepared to name the suspects involved in this,\" he said. The President admitted that one of the theories being looked into was the alleged involvement of members of paramilitary group in the area. \"That is one theory. There are other theories pointing to other threat groups,\" he said. \"Regardless of who did the crime, they will have to pay. That has been the direction of thisn administration from the start - you do the crime, you will be in jail,\" Aquino stressed.