Roy tagliafera was jack tanner.
You would have to assume that jack tanner was related to orville tanner and dumar tanner . No reason to use that name for a pointless character like jack unless it meant something .
Season 1 ep 3 jacks daughter hope a surfer was murdered.
Jack tanner whos wife died was seeing rosaline while he was building a new farm (smells of pine)
He was related to dumar tanner who helped him build the farm and visited rosaline with him.
Red john stayed close with the tanner family including orville his first accomplice, in jail.
*red john knew that jane would go to rosalines house
If rosaline had any info on rj he would kill her or at least make sure jane doesnt know he was there .
Since rosaline had no real info except stuff that would lead jane astray, red john drew his mark making jane assume rj was the man rosaline deacribed.