The circumstances on the guy that got DFed after he died was this:
He fooled around with a 15 yr old boy in the KH, who apparently cooperated, but it was still statutory rape of course. When the teen spoke to his parents about what happened they called the police and the JW pedophile guy took off in his vehicle, fled the state, and then found an appropriate place to kill himself.
The elders decided that since he was a repeat offender (Which I never knew at the time) he would have been DFed anyway and they did not want him to have a "JW funeral". So at the next mid-week meeting they announced he was DFed, AFTER he had died. This was in 1990 or 1991, and before they changed these announcements to "[Name] is no longer one of JWs"
Later my a-hole FIL bragged to me that he knew of another circumstance in another area where a young brother drove recklessly and killed the young JW friends that were with him in the car. According to him they also DFed this fellow in abstentia and "ex-post-muerto" as well. He got off on the whole thing and I could tell that he found it fun and fascinating to recount, that much was obvious.