(Bloomington, IL) — McLean County prosecutors aren’t offering a motive, but say it looks like an East Peoria woman’s daughter killed her. Christine Roush and Matthew Isbell were charged Friday for last week’s murder of Teresa Ann Poehlman. Investigators say Roush stabbed her mother to death, though they aren’t saying why. McLean County deputies say they’re also looking for a third person who was involved in Poehlman’s death.