Who Poisoned Dumbledore?

[brwneil]

No: HPFGUIDX 181432

RAB drank the poison and was dragged into the water.  The elf but the 
fake locket into the basin.  Who did it, and why was poison put back in 
the basin.  Obviously it doesn't refill on its own because it was empty 
when Voldie checked it out after Dumbledore had drank it.

I doubt Regulus was in any condition to mix a potion, that leaves 
Kreacher.  Is a house elf able to brew a potion on an island in the 
middle of a lake and how did he get the exact potion that Voldemort 
originally made.  The more importat question is why?  Why put anything 
back in the basin, especially a poison?  Voldiemort wasn't going to 
drink it.

Neil