Shawn Bentler is a convicted mass murderer from Bonaparte, Iowa. On October 14th 2006, 22 year old Bentler murdered his father Michael, 53, his mother Sandra, 47, and his three younger sisters; Sheena, 17, Shelby, 15, and Shayne, 14.It was claimed that the motive was so he could inherit his family's fortune. He was consequently sentenced to four concurrent life sentences and a consecutive life sentence.