To what purpose?

Is there any point in investigating an accusation against someone who is dead?  We're talking about Ted Heath of course.  A great deal of police time and money has been expended in looking into allegations of child abuse involving him going back decades.  But to what end?  The man is long dead - even if he did these things, so what?  He can't be punished - or depending on your beliefs, he is already suffering eternal punishment.  But what about the "victims"?  Isn't this all about justice for them?  Well, this supposes that they're telling the truth - the whole truth and nothing but....  Just because they've convinced a policemen who maybe was looking to be convinced in the first place doesn't really help us.  So, like I say, what's the point? Or is this all about compensation???