Travelbug- another Agatha Christie plot revolves around the plight of the innocent who are suspects when there is not enough evidence to arrest and prosecute a murderer! The unsolved crime casts a shadow on the lives of those close to the victim, which cannot be lifted until there is some judicial resolution, and they therefore became secondary "victims" of the murderer.
In that case though, they did not know who the murder was, (although they all had theories), and of course they were not complicit in any way, before or after the murder.
Zwei, has Mr Z suddenly become a true crime "addict"?
Zwei, may I also add my thanks to you, on behalf of Bob, and many other victims. You manage to combine dignity with iron fisted determination in the most amazing way, and I think your efforts are simply incredible. I do not believe that they will be wasted. (Forces of nature cannot be ignored, after all) I admire you, and have learnt so much from you!