According to the Blu-ray behind the scenes information, the ending exposition was running over 6 pages, and the writers realized that would take far too long. Richard Gere and Edward Norton began to improv with it - encouraged by the director and writer - and pared the scene down to less than 2 pages with a much crisper ending.
The Chicago PD officers in the film are shown wearing American flags on the right shoulders of their uniforms. Chicago PD uniforms display the flag of the city of Chicago on the right shoulder.
At the original interview, Dr. Molly asks Aaron "How did you meet?" and then she asks "What was the relationship like?". When Marty is watching the interview tape, Dr. Molly, after asking "How did you meet?" says "Doing what?".
The blood at the scene of the murder (where Mr.Vail comes in some days after the murder), and the blood on Aaron's sneakers, shown in the court, should
be brown, because some time has passed and blood coagulates. When blood coagulates it turns from red to brown.
Marty: On my first day of law school, my professor says two things. First was; "From this day forward, when your mother tells you she loves you - get a second opinion."