That's not a weird edge case at all. Adding oil to food is one of the most common ways to add calories (intentionally or not).

A salad wouldn't even be the hardest case to detect, since raw vegetables don't soak up as much oil as other kinds of food.

If it was a police helicopter you wouldn't see it on flightradar24.

Local time.

Oh, I see. My apologies, for some reason I thought the fire started in the early morning hours.

That link isn't working currently, and when I checked it earlier it was referring to an outage which started late yesterday night. So I'm not sure it was relevant.