When I was in grad school at Ball State my classmate worked as a historic sites surveyor for his internship. He surveyed a rural county in west-central Indiana. As he recounted it, one late summer afternoon he was driving along until he came to an old farmstead. Taking a closer look, he entered an old family cemetery, fenced with cast iron and filled with ten or 12 really old grave markers. The farmer did not take kindly to this unsought presence and let the family dogs -- shepherds, if I recall right -- have their run. He told me that the dogs never once barked or tried to scale the fence (it was just 3' or 4' tall) but whenever he went to open the gate they began that deep growling that's never a good sign. He was there for quite some time before the farmer's wife came home and recalled the dogs. He skee-daddled without ever looking back :-D
As to the tragedy in SC, it is a sad, sad day, for sure.