New book uncovers details about Cape Cod's serial killer Tony Costa

In 1969, the bodies of four women were found buried in the woods in North Truro. They were dismembered and allegedly sexually assaulted. Police would eventually tie their deaths to Provincetown resident Antone "Tony" Costa.

Costa's murder spree and subsequent trial are the subject of a new book called "Helltown: the Untold Story of a Serial Killer on Cape Cod." First, we hear from legendary photojournalist Stanley Forman, who covered Costa's trial. Then, we learn more about the book with author and investigative journalist Casey Sherman.