BRENTWOOD, N.H. — A New Hampshire grand jury has indicted a man and two female relatives in the death of his ex-wife, whose throat was slit and body set on fire at a vacant Exeter cement plant.

The body of Amanda “Amy” Warf was discovered March 7 at the former City Concrete Co. building.

The Portsmouth Herald reported that her ex-husband — 37-year-old Aaron Desjardins — was indicted Thursday on first-degree murder and conspiracy charges. His current wife, Sarah Desjardins, and his sister, Michele Corson, were indicted on charges of being accomplices to first-degree murder and conspiracy.

The Desjardins told the media they were not involved in her murder. Corson’s lawyer says she will waive arraignment and stipulate to being held on no bond.