So, I don't suppose Dan can enter David's building without badge flashing?
Here's my roll (I couldn't roll in your thread, @Leidenschaft), let me know if I've screwed anything up.
As pertaining to the score of 6, even with modifier, I'm adding to the rules on badge-flashing. A badge issued by any Federal Law Enforcement agency grants +2 on any persuade and interrogation rolls if it would make sense for the badge to have an impact. The Fake DHS badges grant +1.
In addition, if a character attempts to flash a badge while other characters with Federal jurisdiction are present, each character's roll gets +1 from each partner.
Also, you should check the big block of italics on the previous page to see what Dan is able to find on a successful awareness check when entering David's apartment.
Can everyone tell that this system hasn't been play-tested yet?