That's right, from the first every body noticed that if it was a strangulation, where are the strangulation marks or resisitance marks over the body. Now if it is an aconite poisoning the investigation should quickly check in what are the drugs he is using all these days, is it drug overdose or then who could have given him the drug, by what means it was given. It should not much long to pack up this and end the investigation. Plz give this inv to some other who can just use their brains rather their tongues like Mark Sheild troop