"...an odor of gasoline was detected"
In a fucking gasoline-powered car. Where do they find these geniuses?
I'm kind of concerned about that line as well. The implication is that that the odor of gas was suspected to be related to the presumed explosive device. Thing is, the pressure-cooker turned out to not be an explosive device. So... it turns out the odor of gasoline was either fabricated or as you say, due to a defective car. A huge part of police responsibility is being able to determine truth. It's not hard to figure out that a car is leaking gas. Unless you're making shit up, which is what this particular instance sounds like.