Someone on FFJ or here claims to have known Burke or a friend of his at Purdue and said that Burke had confided in his friends that he could remember nothing at all about that Christmas so I guess he may just have nothing to add.
That would be me. I know someone who went to Purdue with him, and Burke brought up one day out of the blue that he doesn't remember anything, that he kind of blocked it out. So...take that as you will.