What happened to Junior Witter?

The Witter who fought Alexander last Saturday was an even more deteriorated version of the Witter who fought Bradley. After the Bradley loss it was revealed that Witter's father had been diagnosed with a terminal illness only days before the fight and this, for me at least, was a valid explanation for Witter's somewhat sub-par performance. However, from the very first round of the Alexander fight, Witter didn't look quite like the fighter that he once was. He was slower, less accurate and less active than before. In the post-fight interview, Witter claimed that his elbow got injured so he thought the best thing to do was retire from the bout because he was effectively fighting with one hand. If that's true, I can accept the explanation again but I suspect that Witter's age has caught up with him now and he may no longer be able to compete successfully at the high level he once was fought at. It's difficult to know for sure, after all the Showtime commentators completely ignored Witter's claim of an injured elbow and just assumed Alexander was too much for Witter. I think that was a slight injustice to the man, to not even acknowledge that he said he was injured, but of course it is to be expected considering the element of patriotism which can always threaten to cloud a boxing fans judgement. What do you think?