I think it must be him because he is always there and he sounds like red john, I don't want red john to be Patrick because the story will not be as good.... oh and Bruno if you read this I have an idea for a episode just breath... Patrick gets abducted in his room up stairs of the office at night, the next day Lisbon goes to get Jane but he is gone.. there is a note... well any way further on in the episode Lisbon and the team find the car Jane and the kidnapper were in but the car had skidded of a cliff and it was at the bottom, the driver was gone and Patrick was handcuffed and gaged in the back seat barley breathing, Lisbon calls the ambulance and slightly cries... in the hospital after a few days Jane wakes up finding Lisbon at his side asleep and him with a broken arm........ there you go Bruno my episode there is a lot more to that but you can edit or  add to it as much as you want.... oh and p.s I'm a huge fan of the mentalist and please don't let red john be Patrick :(