Police ombudsman to look at Fisher case The SA police ombudsman will investigate the prosecution of former Senator Mary Jo Fisher. THE police handling of the prosecution of former senator Mary Jo Fisher on shoplifting and assault charges is being investigated by the South Australian police ombudsman. Ms Fisher's husband wrote to the state government and the police commissioner last year complaining about how the case was handled. One of the issues is why senior police rejected a plea bargain agreed to prosecutors and Ms Fisher's defence and forced the case to go to trial. Ms Fisher was acquitted of shoplifting but found guilty of assault and released without a conviction over allegedly taking groceries from a supermarket in Adelaide's eastern suburbs in 2011. A key part of her defence was psychiatric evidence presented to the court in relation to her battle with an ongoing depressive illness. The former senator told the Adelaide Advertiser she believed senior police rejected the plea bargain because they were determined to "get a scalp." "The only motive is that senior police officers thought they could advance their position by overruling the wishes of the prosecutors," she said. Attorney-General John Rau confirmed on Friday that correspondence in relation to Ms Fisher's case had been received and forwarded to the police ombudsman, an independent statutory authority. Ms Fisher resigned from federal parliament last year after being charged for a second time with shoplifting. She was subsequently discharged without conviction or penalty but placed on a two-year good behaviour bond.