This chapter starts with a brief change in point of view. An Interpol agent named Amelia Bennett is interrogating a witness. The witness's name: Melanie O'Hara.
Hm, we've heard that name before, and not because we were really tired that time we saw Gone with the Wind … Oh, right. Kat had a passport for "Melanie O'Hara" back in Chapter 3.
Later, Kat meets up with her father. She confesses everything: she got kicked out of school, Uncle Eddie isn't going to do a thing to save him, and Kat has assembled a team to rob the Henley.
You thought it was hard telling your dad about that C you got in Phys Ed.
Then, with perfect dramatic timing, Interpol agent Amelia Bennett shows up and arrests Kat's dad. All she can do is watch them take him away and whisper, "I'm sorry" (21.42).
The girl's been working pretty hard to save her dad, so we wonder why she's sorry. Did she have something to do with his arrest?