"Brother Nate is out defending his globe trotting pedophile brother. The ex-wife is providing an alibi. What an absolutely lovely bunch of people...such a nice family."
On the other hand, they could be fine folks with a creep in their midst. Most families have a black sheep. Don't rush to judgement, particularly on an old man who is already grieving.
Karr might just be a lying pervert who wants notoriety for something he didn't do. Authorities could hardly check out his alibi with family prior to an arrest, for fear of alerting the suspect.
Let's see how this plays out. DNA will probably tell the tale.