If we don't know where we are going, we probably won't get there. Of course, the outline of one's theory will not be written in stone. It can be changed if necessary. Nevertheless, beware of changes. We are usually objective and realistic when we first begin working on a case - before we assume the role of an advocate.
Juries generally hate the insanity defense.
Shrinks, often hired after the fact of a crime, probably have less credibility than the defendant. The insanity defense is truly the last refuge for scoundrels. Furthermore, even if a client is found not guilty by reason of insanity, that client is not free. He will not enjoy being committed to the Illinois Department of Mental Health. Interview the witnesses before the prosecution does.