Put it this way, Kerry Winter has never been in that house. If one spec of his DNA had shown up at the scene it would be enough to have him arrested. That obviously hasn't happened. And I seriously doubt that even the dumbest criminal would go on national TV and say that he fantasized about killing the victim.
Something that has become quite clear to me after years on this forum is that there is a certain percentage of people that will try to attach the crime to any given fact. For instance, if it was said that Barry had stopped at Macdonalds on the way home, a certain number of people would be adamant that the killer either worked at that Macdonalds or was there and followed him home. It just doesn't work that way 99% of the time. Kerry Winter is just a piece of Barry Sherman's life. He is an obvious suspect due to the lawsuit, but if there was anything to it he'd be in jail by now.