The woman who Karina Holmer worked for, she was the wife of Frank Rapp, and was a suspect as the nanny had claimed there were issues and her friend had received a letter claiming something terrible happened, which people believe has to do with the family.
It is said that some paintings of Susan Nichter go to show that she in fact played a role in Karina’s murder. Most believe it was her husband who actually murdered Karina but that Susan knew and helped cover it up.