For those who have asked, the cemetery is called Forest Hill Cemetery in Shelbyville IN.
On the Google map, if you zoom in you will see “St. Joseph’s Cemetery” marked at left of the main Forest Hill placemark. To the west of that marker there is a huge loop in the road that is at the western edge of the entire cemetery, and stretches down into the far southwestern corner of the grounds. Just north of center within this big loop is where the victims are buried: