From the August Chronicle:
"The guns and setup were not located during subsequent follow-up patrols in the area," she said in an e-mail responding to questions about the case. "Capt. Jeff Swift has since talked with the property owner, Jay Williams, who stated that the firearms setup was still in the developmental stage and had not been deployed at that point to shoot any animal."
Web-controlled guns are illegal The Augusta Chronicle
It sounds as though the property owner was still testing the system when it was discovered, to his surprise. I would imagine that it would have all been heavily camouflaged after it had been set up properly.
It seems that he wasn't expecting a human visitor to that area.