The BG now knows who the Gs had went for to whack:
1) It's either the BG himself, someone who Gs think was a random C, but was protected by him/herself.
2) Or it's a sure C like Osman who was protected by the BG.
If it's the first option, then the Gs now know who the BG is so he/she can reveal his/her role to the public too. The detective will contact him and we will have a strong alliance.
If it's the second option, well done BG, great job