Clearly many people initially thought or presumed Sheila was responsible. I don't think there is any misconception with that?
H., if we look a how that initial opinion was formed, we can only look to it's source which -even if we're prepared to believe Nevill's alleged call to the police- was Jeremy. The case -certainly the most important, if not the biggest Essex has ever handled- was discussed, at length, at a recent police funeral. All agreed that Jeremy was guilty.