If Bertram was Red John then two things bother me.

1. Why didn't she kill Lorelei when she was at the CBI ? He would have had time and he couldn't risk her talking.

2. Would he have the time to be Red John ? I mean isn't someone going to notice the CBI director keeps going missing ? Red John was waiting around on a farm in season 1 finale and in the 4th finale he must have been somewhere alone to be speaking to Jane down the phone.

Cheers