Actually I didn't see the movie, I've just read the book but I have a work to do about it and one of the questions is “How did Philip consider death?"¯ I don't know what to say cause the book doesn't show any clue about this! Do you've any idea?
The others questions are “How did Philip consider the death of Mrs. Baines?¯" and "What was the police's conclusions and attitudes", and what was Philip's contribution to them?
For the first question, I would say that Philip saw in Mrs. Baines a kind of enemy, he didn't like her because she was very authoritarian and rude sometimes, so he whished she disappeared. When she die, I think that Philip didn't believe what had happened, that why he kept on imagining, thinking, what would happened to him when he came back from the street. Even when he arrived home, he didn't show any reaction, he didn't cry or something like this, he just didn't what to see the dead body. I think that in fact he was pleasant, relieved cause she would never came back.
For the second one,I think that the police had believed that Mrs.Baines' death was an accident,till they went to the house.They just changed their mind,when Philip,in his innocence talked that the body was in the hall and that he didn't want to see the body.Only after this,the police started to inquire Mr. Baines...