You’re probably thinking of Rudolph Hess, who died in Spandau Prison at the age of 93, found with an electrical cord wrapped around his neck. The circumstances of Hess’s death are very strange, because by all accounts he was quite frail by the end (requiring daily nursing care) and didn’t have the mobility to string a cord up and hang himself.
Some sources claim that British secret service agents did him in, although it would seem rather senseless to kill a frail old man who was probably going to die soon anyway. Unless of course they had it in for Hess to the point where they weren’t going to allow him a natural death under any circumstances.
“You’re probably thinking of Rudolph Hess”
Yes, exactly! That’s whom I was trying to remember. It was a mystery about his death, I remember that as well.