The Tench storyline with his kid wasn't real either (had three kids, not one) though the murder they described with the kids is based off similar events with someone else. That whole storyline, while I understood what they were getting at, was irritating. The wife was irrational to the point of a cliche and it just dragged everything down. They could have handled that a lot better.
Other than my gripes about that and the forced lesbian relationship, this season was excellent just like the first. Their casting and makeup/costume department is flawless. Every killer is almost identical with their real life counterparts.