Something that came to mind and I thought was curious is various things that point to Karr having religious beliefs or maybe a religious fanatic? The naming of his twins that died was odd. Wasn't it something like Innocence and Angel or some ilk? And the names of some of his kids were taken from the bible. The possibility that the initials SBTC found in the ransom note standing for "Saved By The Cross". He seemed to be gravitating towards teaching in Christian schools. Both of his young wives complained that he was too controlling and the schools in Bangkok claimed he was dismissed because the parents complained he was too strict.