Trivia: Alison Lohman, who plays Nicolas Cage's teenage (14) daughter, is actually 24.
Trivia: The 4 main characters (Roy, Angela, Frank and Frechette) all smoke at some point in the film. This is a clue added by the filmmakers to indicate that the people who smoke in the film are con men, a teaser if you like to indicate that Angela is also involved in the con (This is revealed in the DVD director's commentary).
Trivia: Frank Mercer is the combination of John Mercer and Frank Sinatra, whose discs are played by Ron Waller throughout the movie.
Answer: Angela was working with Frank the whole time, she wasn't actually his daughter. Roy's shrink (Dr. Klein) & Chuck Frechette (the money laundering guy) were in on the con as well.
kimmyd
If Chuck was also in on the con then why was Frank so beaten up? And why would they bring up the whole talk about the ashtray from the gift store and how the camera in there had seen Angela if Chuck was already supposed to know about it all?
Their whole plan was to get his vault password, how to get it? By making everything looks real. The death of Chuck -> Roy says he is the one who killed him -> His "daughter" is running because she is the main suspect -> Roy gives his password to the shrink so he can give it to his "daughter" That means Chuck, Frank, Angela, The fake police men, and the shrink are working together.