Not sure it's all been covered here, but Kerwin's dad has done interviews with both a UNC and an Arizona fan site (the Arizona one was the one that made waves here, but the UNC one actually came first) where he didn't mention Minnesota. Kerwin himself will mention Minnesota when asked. It doesn't seem to hard to read between the lines that dad is comfortable telling people Minnesota is not in it while Kerwin is not.
Put yourself in the position of the Waltons right now. Kerwin is not a one and done player and Pitino has little to no job security right now. Would you send your child (or go yourself) to a school where there was a good chance of a coaching change after your first year on campus?
Pitino wasn't doing a good job landing kids last Spring, or this Fall, when he was coming off his first NCAA tournament win and had a contract extension in hand, so expecting him to land kids now is just an exercise in disappointment. 60's guy had the best post about this where Pitino would be best served to find an assistant to replace Jeter that has a player (or hopefully players) attached to him that will be eligible in 2020. Hire a kids brother like Oklahoma State did recently or Danny Manning's dad at Kansas decades ago. There might not be that sort of package deal available this late in the process but it's arguably Pitino's best chance if there is.