I'm working on a maintenance / support project. I've been working on it since a long time.
My manager had put in a fellow colleague as a replacement for me after I said I wanted out some 8-9 months ago and I've been busy transferring my responsibilities to him.
Recently, a critical requirement came from the client and it required quick action on our part. I had told him to handle this and take care of what the client was asking. But he kept dragging me into it, involving me in calls and directly addressing me in mails to the client thereby creating a dependency on me. He also kept this thing pending because he needed me to explain what the client wanted since he didn't understand it. I got busy in some other work and this escaped my mind.
Several days later, because of inaction, the client escalated this to my manager and I was criticized because of non response to this even though I wasn't even working on this. He took partial blame because he hadn't responded but most of the blame fell on me since I'm the main support person for this project and had not helped him understand the task.
Wasn't it his fault this whole thing happened? This has greatly upset me. How should I approach this situation?