I still like the relationship part of any story. You don't want your character to figure everything out and then at the end of the day go home and eat soup from a can by herself.
I especially object to having my character assassinated by reference to events from my past which bear absolutely no relationship to the question of who the anthrax killer is.
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The closer and more confidential our relationship with someone the less we are entitled to ask about what we are not voluntarily told.