During the process of smoking, is it possible to have one's sense of smell desensitized (from smoke) to a point where he or she cannot smell leaking LP gas? Could other possible factors or combinations of influence the sense of smell, like fatigue, medication, alcohol, etc.? I'm trying to understand how someone could attempt to relight a smoker under the conditions described in the article as "evidence".
In this case, it sounds like the smoker's location was indoors and assuming vented to the outdoors. So, smoke probably wasn't a factor?