It's an excerpt from the book "Bitcoin Widow: Love, Betrayal and the Missing Millions" by Jennifer Robertson with Stephen Kimber [0]. The CBC ran a story that provides an overview of the whole debacle [1].

[0] https://www.amazon.com/Bitcoin-Widow-Betrayal-Missing-Millio...

[1] https://www.cbc.ca/news/canada/nova-scotia/quadriga-widow-je...