In such cases, where a person is found dead in a public place, there's always an autopsy.
7 seconds sound clip from the Monsieur Verdoux movie soundboard.
You can hear this line at 00:56:11 in the Blu-ray version of the movie.
Quote context
[...]
- That's quite an idea. We'll incorporate and go into business.
- Insuring people and having them die of heart failure? We'd make millions.
- I'm not sure, but I think the poison might show up in a man.
- Why?
- How?
- Simple.
- In such cases, where a person is found dead in a public place, there's always an autopsy.
- You'd know the result without taking the slightest risk.
- However, such experiments we had better leave to the archcriminal, don't you think?
[...]