Pennsylvania law enforcement authorities are hoping the public can help unravel a mystery surrounding the alleged poisoning deaths of nine horses in two of that state’s counties.

Lower Windsor Township Police Chief Tim Caldwell said that at 7 a.m. on March 22, his department received a 911 call from a man who reported that four horses at Allimax Farm had been poisoned. The caller identified himself as Joseph Meyer, the horses’ owner, the owner of Allimax Farm, and a Morgan horse breeder, Caldwell said. Police personnel responded to the farm and discovered the dead horses’ carcasses lying in a field, Caldwell said, but Meyer was not at the property.

“He said he was on route to Harrisburg,” Caldwell said. “Since then, all we’ve been able to do is leave business cards at the farm.”

On March 29, a man identifying himself as Joseph Meyer of Allimax Farm, appeared in a video posted on YouTube. In the video, Meyer says that a total of nine of his horses were poisoned in York and Lancaster counties. Meyer alleged that the poisonings were done by animal welfare activists, and that he and his family fled the farm for their own safety