"Ah, here's the autopsy report. Ligature marks, coupled with deep wounds indicating that piano wire was used. We don't count that as a natural cause, right? And she just took out the five million dollar plan two months ago? Something is very suspicious here."
The account is amusing in a morbid kind of way: https://www.history.com/news/double-indemnity-1920s-murder-crime-tabloids