at last close the case. >> we thought at that point in time that we had reached that threshold of probable cause. >> i had prepared an affidavit for an arrest warrant. >> so, you were ready to arrest john feit for the murder of irene garza? >> yes, sir. >> but one man was not convinced and never has been. >> you have no credible person back in '04 and even before that you could put on the stand that would convict feit. >> rene guerra is the district attorney for hidalgo county, texas. he says he's not protecting the church. he just doesn't believe the two witnesses, father o'brien and dale tacheny, partially because they both changed their stories after years of silence, and he questions father o'brien's age and state of mind. father o'brien was 77 when he came forward. he has since died. >> o'brien might have been