being.” “Proving someone has committed arson is never easy,” said William. “Unless there are obvious, telltale signs, like traces of accelerant on a floorboard, or a petrol-soaked rag that’s been dropped through a letterbox—the sort of crass mistake only amateurs think they could get away with.” “And the professionals?” asked Christina. “A pile of tissues placed just below a wooden roof next to an immersion heater, and then one match is all it takes. There aren’t many people serving prison sentences for arson, as it’s one of the easiest crimes to get away with. So, we’ll have to concentrate on
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