Strangely enough, in the postmortem not a trace of the poison can be found neither in the stomach nor the blood.
8 seconds sound clip from the Monsieur Verdoux movie soundboard.
You can hear this line at 00:55:32 in the Blu-ray version of the movie.
Quote context
[...]
- The results are interesting.
- What have you done about it?
- Nothing.
- The State Medical Department banned it.
- Why?
- Too dangerous for public use.
- Can you imagine such a weapon in the hands of an archcriminal?
- Think of the money he'd make from the insurance companies.
- 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?
[...]