Requesting information on a banned user 

Dear Mr. Chapman:

I write to you to request information regarding the blocking/banning of User:Mr Spunky Toffee, sockpuppet of User:Brian G. Crawford.  I ask because I had a run-in with him a couple of months ago, in which he attempted to delete a page I had written and insulted me repeatedly.  I was intrigued (but not altogether surprised) to discover a few days ago that he had been blocked as a sock-puppet, but I do know that he had a long history of personal attacks on other users.

What I would like to know is, what was it that got Brian G. Crawford banned from Wikipedia in the first place?  He is not listed on Wikipedia:List of banned users, nor is he included in the Category:Banned Wikipedia users.  His user page states that "This user is banned from all Wikimedia projects by order of the Foundation."  But, the Wikipedia:Banning policy page states that "The Wikimedia Foundation has the authority to ban users, though it has not exercised this authority on the English Wikipedia."

So frankly, I am a bit confused as to what went on here, which is why I am asking you, as you are the one who discovered that Mr Spunky Toffee was Crawford's sockpuppet.  I will understand if this information is confidential or otherwise unavailable; if this is the case please let me know on my talk page.  Or, if you would rather talk to me in private (by e-mail or otherwise), let me know and I would be happy to accommodate you.

I thank you in advance for your assistance.