Didn't hear about that one. Last time I heard of an elderly man "falling overboard" was Mr. Klinghofer (probably mangled that spelling), the gentleman in a wheelchair, on the Achille Lauro years ago. He...uh..."fell overboard" after he was shot by terrorists.
I know the one you're speaking of but this was recent, as in this spring. Poor guy probably fell overboard. I know the Coast Guard etc spent time looking, to no avail.