Lawyer Jose Ferrer's Cast

Rating: 9/10 (13 November 2005)

This is one of my favorite movies, and, for me, the best one that Jose Ferrer has been in. His lawyer is one of the best in movies.
However, there is one part of his role that has always left me puzzled:
Can anyone explain to me why Jose Ferrer's character wears that awkward arm cast? They mention right away in an off-hand way. Someone makes a joke about it, and the Ferrer character just mutters something, and that's the end of it. However, I believe it must have been the result of an actual injury of the actor, thereby forcing him to where the cats throughout the movie, although it is never required for plot purposes.
Does anyone have details on this episode? been able to ascertain if it was an actual injury of the actor, who was then forced to have the cast.