if 666 of episode 1 season 6 is the clue Hiller mentioned

May be its
Season 6
Episode 6
Minute 6

this is the image we get at exactly 6 minutes and 6 seconds of episode 6
http://postimg.org/image/fsrp06ry9/

why did they show this hanged guy , there was no case this episode , Reede smith is standing behind him
may be its nothing but does any one recognise the hanged man or see any clues ?