Sirius, Remus and the Fidelius Charm

[mjollner]

No: HPFGUIDX 33795

One more element to consider when pondering the whole Fidelius Charm 
morass: according to the Shrieking Shack scene toward the end of PoA, 
Sirius thought Remus was spying for Voldemort (and vice versa), which 
was why Sirius wanted to change the Secret-Keeper in the first 
place.  

Not that this explains how the whole thing works - I do hope JKR will 
illuminate us on that point in a future book! - but it adds an 
element to Sirius' motivation.  He wanted to fool Remus because he 
thought he was a traitor.  And therefore chose Peter...

"mjollner"