That letter doesn't look like it was really written by a lawyer. It may well be a crime for someone to impersonate him, in this kind of context.
I would suggest that you contact the real Stephen Jones, looking up his contact information for yourself, and provide him with a copy, including headers. You might also want to provide a copy to the police.
That was my first impression, too. But, after all, Stephen Jones is the same guy who plagiarized Abraham Lincoln in writing a farewell letter to his local paper. (And yes, it was a well known Lincoln speech he plagiarized...) So maybe Jones just isn't a very good writer...