A federal grand jury in Chattanooga, Tenn., has returned an indictment that adds charges against three Tennessee residents already accused of violating the Horse Protection Act (HPA) and indicts a fourth Tennessee man in connection with the case.

The previous indictment returned in March alleges that between 2002 and 2010, Spotted Saddle Horse trainer Barney Davis, along with Christen Altman and Jeffery Bradford, conspired to violate the HPA by soring horses. The three are also accused of falsifying forms and other paperwork required under the HPA to exhibit animals.

According to that indictment, Davis allegedly placed bolts in horses’ feet, taped blocks to horses’ feet, and applied other soring techniques to horses prior to competition. The indictment also alleges that Davis would remove external devices prior to pre-performance HPA compliance inspections, and inject horses with pain reducing drugs to limit the animals’ reactions to inspection procedures.

The indictment further alleges that Davis and Altman used others as nominee trainers to obtain trainers’ licenses, and that Davis, Altman, and Bradford falsified horse show entry forms and other documents claiming that Bradford and others were trainers of horses actually trained by Davis