Conversation so far:
What was Evanescence's Open Door?
The Open Door is the second album by the American rock band Evanescence.
How did Evanescence's album, The Open Door do?
The Open Door debuted at number one on the Billboard 200, selling more than 447,000 copies in its first week and reached the top five in over 15 countries.
Did Evanescence tour for their second album, The Open Door?
The Open Door was supported by two worldwide tours, The Open Door Tour and the Evanescence Tour.
Are there any other interesting aspects about Evanescence's The Open Door album besides it's success and tour?
On May 4, 2007, Evanescence's John LeCompt announced that he had been fired and also stated that drummer Rocky Gray had decided to quit.
Why was Evanescence's guitarist John LeCompt fired?

Question: who replaced him?
Self-contained rewrite: Who replaced Evanescence's guitarist John LeCompt?