Why does McCaleb have his retirement status? What makes him change his mind about helping Graciela?

Why does McCaleb need a driver to get around? In how many other ways is his life restricted or monitored and why does Graciela think that McCaleb will help her?

Why is there a time discrepancy with the Gloria Torres killing? How is this significant?

What are the factors that link Gloria Torres, James Cordell and Donald Kenyon? How are they important and what mistakes were made that required so many attempts?

Who is the hypnotist that works with witness James Noone? What indicators are there that he is receptive to hypnosis and what relaxation techniques are used? How is this session important to the solving of the killer's identity?

What factors make Dr. Bonnie Fox drop Terry as a patient? What changes her mind later and how...