"Hush, Chapter 11 of 12: The Game"
*Batman battles a man who seems to be Jason Todd, but realizes that this is Clayface, pretending to be Todd without quite knowing why. He is determined to find the person behind all of the recnt upheavals in his life, and with Oracle's help he tracks down the person responsible for a rogue subroutine in the Batcave's computers... Harold. He arranges a meeting with Harold, who tells him that the betrayal was because the man could promise him healing - he is no longer mute, and he can walk proud and tall. But before he can tell Batman who it was, he is killed. *Source: DCUGuide.com