[bitwize]

That's what I thought of. "Weird Al" Yankovic's parents were both found dead of carbon monoxide poisoning about 15 years back in a very similar fashion.

[canucker2016]

Former tennis pro, Vitas Gerulaitis, died from carbon monoxide poisoning from a faulty propane heater.

https://www.atptour.com/en/players/vitas-gerulaitis/g008/bio