The full quote doesn't make it any better IMO. The context you provide does provide some explanation, but an explanation to a response he didn't give.
If he had said something along the lines of "I have received this complaint and while there are not enough details to specifically respond I look forward to defending myself in court" that would have been another matter entirely.
The response he actually gave just sounds suspicious. There's not enough to claim any knowledge of wrongdoing but it also doesn't give off an air of confidence in his innocence.
Why? I haven't reached any conclusions either way because I haven't heard the facts yet. I have an open mind towards all possibilities. Isn't that what you would be looking for on a jury?