This was a well-known case, considering that it was the largest CEX from Canada, whose owner allegedly went to India and died there - but his body was not seen by anyone relevant who could confirm his death - while the investigation led to the fact that the death certificate was issued by a doctor who could not really remember the case - which is not surprising, because such a certificate costs very little in India. Gerald Cotten was a scammer his whole life, and he disappeared (died as such).

As for Cryptsy, I remember that scandal too, although I remember Quadriga better since NF made a documentary about it that exposed the whole thing pretty well. If you can, watch the documentary - or read it for more information Quadriga