Complex sentence: Clifford apologizes for his actions, however Martin at this point, is fed up with believing Clifford thus making Clifford turn his life around and becomes a priest and devotes his life to helping other dysfunctional boys.
Split into simpler sentences: Clifford apologizes for his actions; however, Martin, at this point, is fed up with believing Clifford, thus making Clifford turn his life around. He becomes a priest and devotes his life to helping other dysfunctional boys.