Ray haffner has always been on the Top of my suspect List....But My recent findings might have just pushed sheriff Thomas Mcallister to the top...check Out Below Links for more info

http://www.imdb.com/name/nm0634984/?ref_=tt_cl_t4

The above link is about a person who is gonna play the character "Young Man" in RED JOHN episode and we all know who the young man means(Red john younger version)

Look at this pics
https://twitter.com/nicknordella/status/385418140722528256/photo/1/large
http://instagram.com/p/g2S7L3weyh/



and now look at his twitter account 
https://twitter.com/nicknordella

Take a close look at one of his retweets.....i.e Orsolya L's tweet

and finally resemblance match..
http://www.ddoagency.com/images/artists/artist_1301425352_43_l.jpg
http://www.magweb.com/picts/nm0075359.jpg

Boom there you Go...don't you think they look exactly alike.....Thats it from me