Chapters 9-10

In chapter 9 we learn that David’s little sister Petra has a different kind of telepathic power. I think that she can control people and can hide here ability from they others but can still hear the conversations. I want to learn more about her ability. Then later in Chapter 10 we read the Anne one of the telepathic people is getting married to Alan. Every single one of the group members thinks this is a bad idea. I agree with them all it could bring is trouble. It is interesting the conversation David and Uncle Axel have.  He basically says we have to kill one of them. David doesn’t want this to happen I think David did the right thing. But later in the chapter we here Alan is killed. But no one noes who did it. My guess would be Uncle Axel because he must know something we don’t. But I am curious to why Anne would kill herself and write a letter to the inspector. Is there that much hate between her and the group? Also wouldn’t it be more effective to tell the inspector herself? Because if her life didn’t matter that much why wouldn’t she make sure she would get them all caught? But I think it is a huge relieve to all the telepathic people that Alan is gone because lest chance of a leak. But I am still very curious to what role Petra will play.