APPLETON, WI (WTAQ) - The third and final defendant in a six-year-old murder case in Greenville is due to make her first court appearance Monday.

38-year-old Rosie Campbell of the Twin Cities area is charged with being a party to first-degree intentional homicide. She and 34-year-old Kandi Siveny of the Twin Cities were recently extradited to Outagamie County, where Siveny had a million-dollar bond set during her first court appearance in Appleton last Friday.

The two women, plus Siveny’s mother Dianna, are all charged in the 2007 shooting death of Dianna’s domestic partner, 30-year-old Lara Plamann.

Authorities said Kandi Siveny apparently fired the gun that killed Plamann, because she suspected that Plamann was cheating on her mother.

Dianna was reportedly the sole beneficiary of Plamann’s estate, and authorities said the victim had an affair a few weeks before she was murdered.