By Gregg WendorfAdvance News JournalWhile writing a book about the April 16, 1960 murder of McAllen Teacher Irene Garza, a lot of people who played a part in this story stand out. Some more than others. For various reasons. I call them the good, the bad, and the ugly.Three weeks prior to the murder, her killer, Father John Bernard Feit, was already off the rails, so to speak. Case in point: on a weekday, at approximately 6 p.m, he assaulted a 20-year-old college student named Maria America Guerra inside Sacred Heart Catholic Church in Edinburg. He came up behind her,