Red John is none of the suspects, is the one we never expected. RJ is Patrick Jane, he has 'Dissociative identity disorder', that is how he had the same names that the DVD and why RJ was able to steal his 'happy memory'. Lorelai really loved Jane, they have this 'connection' and that is why she did the recording on the DVD.
Ask yourselves, how Patrick Jane can solve every case and never the ones when Red John is involved.
At last finally i saw the latest episode
Bob is not RJ he is a friend to him ...
i think that bob doesn't want to know who is RJ he wants to know where is RJ
as if he wants to know Rj identity he simply ask lennon about his name!!
Bob wants something from RJ may be ( money - Revenge - ...etc ) so
he killed Lennon as he afraid that if Lennon talk about Rj Identity , RJ may be caught or killed >> BOB wants RJ alive !!
bob searched jane room as he may take some thing lead to RJ
Jane and Bob wants the same thing to find RJ but Bob has an advantage as he is already Knows who is Red John
thanks