SPRING VALLEY - Police continue to search for the person responsible in the death of 80-year-old Rockland County Democratic Committee leader Peggy Nadell.

Nadell was found stabbed to death last month inside her Valley Cottage home.

District Attorney Thomas Zugibe tells News 12 the case is far from cold. He says police have gathered comprehensive evidence in Nadell's stabbing, and although the details of the investigation must remain confidential for now, authorities are making extensive steps toward a final conclusion in the case.

Zugibe also says they are not leaving anyone out of their investigation, including Nadell's family. Her daughter, Susanne Nadell-Scaccio, initially told police she pulled the knife from her mother's body, but is no longer cooperating with authorities.