Reads With Friends discussion

The end was missing something. We never got to see what was in the envelope at the end nor do we find out who killed Charlie. Like they say he was thrown on the lawn and had a high alcohol level. But did john do it? Was it a suicide? Was that girl put in jail? Was john put in jail? I rated it 4 stars but really it was like a 3 1/2 because of the ending. Lots of unanswered questions.