I'm still stunned by this news and immensely saddened.
Hilton was a guy who I caught in performance a good number of times, mainly back in the 70s/80s when he was very much up and coming but also caught him at the great NYC Birdland gig recorded by Candid. He was by far my favourite Latin jazz pianist, an absolute master in that idiom. I also never saw him give less than 100% at his gigs.
RIP.
Here's the Birdland CD (in which he was absolutely at his prime).