This from the article seems to rule out CO poisoning.
“Firefighters were called to the property but there were no signs of a gas leak.”
I’m now leaning away from CO poisoning, but here’s what AI says about gas not being detected in certain events.
Yes, it’s possible for someone to die of carbon monoxide (CO) poisoning and for the fire department to find no trace of the gas by the time they investigate. Carbon monoxide is a colorless, odorless gas that can dissipate quickly in certain conditions, especially if the source of the CO is no longer active or if ventilation has occurred before the fire department arrives.
Here’s how this could happen:
1. **Source Stops Producing CO**: If the carbon monoxide came from something like a malfunctioning heater, car exhaust, or a small fire that burned out, the source might stop emitting CO before the fire department gets there. Without an ongoing leak, the gas levels could drop.
2. **Ventilation**: CO is slightly lighter than air and can disperse through open windows, doors, or natural airflow. If someone opens a door or window after the person dies—say, a neighbor or family member checking in—the gas could clear out before testing happens.
3. **Delayed Discovery**: If the death isn’t discovered immediately, hours or even days could pass. By then, CO might have dissipated naturally, especially in a drafty or unsealed space.
4. **Testing Limitations**: Firefighters typically use CO detectors, but if the gas has already dispersed below detectable levels (usually around 5-10 parts per million for standard equipment), they might not pick it up. The absence of CO at the time of testing doesn’t mean it wasn’t there earlier at lethal levels.
That said, CO poisoning leaves clues in the body—like cherry-red skin from carboxyhemoglobin in the blood—which a medical examiner could spot during an autopsy. So, while the fire department might not find gas, other evidence could still point to CO as the cause. It’s rare for it to vanish without a trace, but the gas itself can absolutely be gone by the time they arrive if conditions allow it to dissipate.