:RAN asked for my comments.  
 ::How much quoting is appropriate depends on several factors: the function in the article, the free availability elsewhere, the encyclopedic rather than sensational or propagandistic purpose, the extent to which the quote might replace the needs for a long rewording of the same material. The actual fair use restrictions in the US will rarely come into the picture, but the key variable that will affect us is the proportion of the quote to the original work: one cannot claim fair use for an entire short newspaper article, regardless of length.  
 ::Whether the quote should go into the article or the footnote is also a matter of judgmentmy view is that a long quote in the article should not be repeated in the footnote. The key point of putting it into the footnote is to provide for WP:V, especially of  non -free or especially of hard to access material, and particularly of material likely to be challenged, such as controversial political or critical opinion, or a disputed fact such as year of birth or nationality. 
 ::As for style, I think short quotes are usually best, and I think adding emphasis to a quote by boxing or especially by pull quotes to be something to be done rather sparingly.  
 ::The question for this article seems to be the letters: I would remove the box. I would probably keep only the key portions. I would source them not just to the convenience web source used, but to the actual original. I think our writing about crime does tend to be a little over-sensational and over-detailed. This article is not really very much over the mark in that respect, considering the unavoidable nature of the material.  I would make it clearer what parts of this depend only upon his own account of his life and his own confessions. Personally, if it were not for the x-rays, I would have considerable doubts about his basic veracity.   
 ::The question of homosexuality was raised above. In his day, this would no doubt have been seen as adding to the extent of his perversity and even as explaining all that came after his early experiences. I think most people can realise the historical element as well as I can. To a considerable extent, this is helped by the use of quotations.   ''''''