Eight Beheaded Dogs Found in IN Creek

A grisly discovery in a creek in Madison Co, Indiana:

Sheriff Ron Richardson says, "Possibly Greyhounds. There are eight animals in the water. It looks like none have heads. Heads have been removed. We'll know more once we get them out of the water."
[...]
It's unclear how long the dogs were in the water. Blood still appears to be around the carcasses. And there may be more dog carcasses downstream.

I hope they can more definitively ID the breed because that will be useful to the investigation I would think. The Sheriff's Department is asking anyone with information on the case to contact them.