Honestly, I don't think Occrider's e-mail was blunt enough.
If the guy wasn't working on the team, you should make it clear to him. Tell him what needs to change. If not, make it formal in a letter (because you work in a bureaucraccy). Third I'd spell-check and grammer check my e-mail to bring it on par to writing levels on PDD. ... Especially when you CC it to your high-ups.
Lastly, if all fails, don't skirt the issue say this is why he's bad: a, b,c. This is why he's not a bad person... and just that he doesn't fit the dynamics and would be of better value to the organization somewhere else...
BTW, go read Jack Welch's new book.
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