JOPLIN, MO--- Jonathan David Rector, 28, of Lamar was charged with Second-Degree Murder in a shaken-baby death. Earlier this week, Rector pled guilty to a reduced charge of voluntary manslaughter. He was sentenced to 15 years in prison. Rector admitted he had shaken 4-month-old Kaiden Stevens in a fit of rage while babysitting the infant back in February. Kaiden died three days later.