Because nobody knew or would have known what to look for in anyone suffering withdrawal symptoms even though it was said that Sheila wasn't herself with not wanting to speak to her aunt on the phone. That would have been a hint to those who were familiar with withdrawals.
Nobody knew, apart from you? You are smarter than everyone that was there and are able to pick up on something that NONE of them were able to even though you weren't there, you never met any of the people, you never saw them, you never witnessed their behaviour.
If not wanting to speak on the phone to someone is a sign of drug withdrawal then I think we have all been guilty of that at some point and that is the weakest and most pathetic argument as evidence I've heard.
