assuming that quadrigaCX even had cold storage at all is almost like taking craig wright's claims about the tulip trust at face value. there is nothing i have found that supports the narrative that the cold storage keys died with cotten. it's just something his wife and the other executives are claiming. so if he really is dead, i hope his death doesn't lend credence to their narrative. his death wouldn't prove that a massive fraud was not occurring.
The idea that private keys were in the hands of one individual alone is hard to believe just as Powell pointed out.
If the body is exhumed and it is identified as Cotton then still it does mean the end of the investigation. There will be an autopsy to check for clues how he died and since Mrs Cotton was the only person with him on that holiday and philanthropic trip the finger of suspicion will fall upon her even if the evidence might lack.
The other possibility is that if the body is exhumed and it is identified not to be Gerald Cotton then it opens up scope to widen the investigation. Mrs Cotton is not exactly out of this just yet and the plot could thicken even further.
| was using investors of the exchanges funds to use on bitmex.