I think Redjohn case is over (I hope me wrong), mentalist episodes is based on the manipulation, suspense complicated business ect ... 
Why not do a full season for arrested or killed or eaten? (Wtf hannibal) redjohn then this is the largest plot of the series, why its sloppy 2 small episodes (and even then you would say), j hope that we will be amazed at the end of the season because if the sheriff is redjohn I would be really disappointed to have given an end as "simple" in this puzzle investigation which lasted six short seasons I express my discontent towards this end Redjohn. 
After it's still a series enjoyed in moderation and with a cup of tea. :-) 
Sincerely Red stiles 
(sorry for my bad english) 

If you have time ... (https://www.youtube.com/channel/UCIHDzqFbyxJWTyVMovSdhOA)