Peter Parker of Earth 1950 (Hokey old horror comic Universe)

This is how that story would play out...Peter is the no good nephew of wealthy Aunt May, and he can't wait for her to die so he can inherit her money. So he sneaks into her room late one night while she's asleep and puts a black widow spider on her. Well Pete (who's an adult) just happens to be at that radiation demonstration for some reason and is bitten by the irradiated spider and he dies horribly on the spot. By the way, the spider has Aunt May"s head...:)