BRENTWOOD, N.H. (AP) — The New Hampshire man charged with killing his 36-year-old ex-wife is expected to be arraigned Wednesday.

Prosecutors have charged 36-year-old Aaron Desjardin of Epping with first-degree murder in the death of Amanda “Amy” Warf, whose body was found in a vacant concrete plant last week.

The chief medical examiner says Warf died of multiple wounds to the neck.

Police searched Desjardin’s house over the weekend and he told the media he had nothing to do with his ex-wife’s death.

The couple divorced in February 2012. They have a one-year-old son.

Warf’s body was discovered by Exeter firefighters after they put out a fire Thursday morning at the concrete plant, which has been vacant for more than 20 years.

Copyright 2013 The Associated Press.