Faking Sirius' Death?

[ftlauz789]

No: HPFGUIDX 91490

Very good theory! I have but one problem...

<<<It's just a matter of time before Lucius leaks his information to 
the
Ministry and/or Voldemort. This puts them all in great danger. And
clearly, Dumbledore's plan of Sirius hiding out at Grimmauld Place
indefinitely is not working for Sirius.>>>

How does Lucious know of his wereabouts? Kreacher couldn't tell him 
where Sirius was because he was not the secret-keeper for the 
order...it says that somewhere towards the end of the book. So far, 
I don't think Voldemort can know where the Head Quarters of the 
Order of the Phoenix are.