The Ant Keeper "A never before seen way of disposing bodies"
So the idea is simple. put the body in the dirt where no one will see it or step on it. Pack dirt suuuuper tight on top but its the location that matters most. The body must be buried next to an ant hill. Fire ants find there way to the body creating lots paths in eating the bodies then what ends up happening is this spot in the woods with the fire ants starts to get over run with fire ants. The main murderer character cant even get out there without protective suit because the ants have outgrown the amount of bodies in the dirt they will attack anything. Still he rolls the body on a little red wagon out into the forest and buries it near the ant colony. Before long locals learn of the ant infestation and people tend to stay away from that area from then on. As the body count dwindles the ants feast on each other culling the population but still maintaining the protection over the area from people walking around poking their nose.
At one point some researchers come to gather data to learn how the ants are thriving in this area. They are killed by cyanide gas mines and when the main character gets there they are already eviscerated all thats left is a skeleton and some car keys so the car is driven off into a near by lake and the area is no longer fit as it drew too much attention. The main character never returns to that location. The hydrogen cyanide booby traps are detonated one by one by authorities once the location gets enough attention due to the ants and the missing researchers. The bodies are found and the story gets nation wide attention and a new serial killer is born... The ant keeper.