Mafia 27. The problem of Bovblob residents

So, something isn't quite clear to me. I have some questions: 1. If Ling is the culprit, then what was that black cloak and laughter outside the window? Was it death? 2. Where is the Necropolis of Death? 3. Why compare Morny and Kostyan? = The first one's result is his own. Morny can be trusted, yes, but as for Kostyan... now I don't know what to do. If someone can find the Necropolis of Death for me, I would be grateful. And yes, in the first paragraph about Ling, is there a clue, or is it a red herring in the second? How can I figure it out?