According to the petition filed in Wake County, N.C., Wednesday by Cooper's mother and father, Donna and Garry Rentz, and her identical twin sister, Krista Lister, Brad Cooper would routinely deny his wife money needed for grocery shopping and was unfaithful to her in the months leading up to her murder.
Brad Cooper "engaged in a pattern of emotional abuse," "frequently yelled at Nancy Cooper and belittled her in the presence of the minor children," and was unfaithful to her in the months leading up to her death, according to the petition.
When her husband would allegedly withhold financial support from Cooper, the mother would become so desperate for cash that she was forced to borrow money from family members, according to the petition . Cooper's family also claims that Brad Cooper is "mentally unstable" and threatened to commit suicide in the winter of 2008.
Brad Cooper has not been named a suspect or a person of interest in his wife's murder, police said.