RJ is not Jane! How can he talk to himself on the phone and save his own life when he is tied on a chair? 

Some people say that Mcallister should be RJ because he's only seen in one episode of the first season. No! All suspects are in the list because all other ( male )  people who shook hands with Jane were out ( age, place, etc. does not match with one or more RJ events ).

I think the key is Partridge's death.. Why did RJ kill him?  Why did Partridge say "Tyger, tyger " ? Why did RJ want Lisbon in that scene?