"WHO MURDERED Policeman F. Cione?"
Twenty billboards around Philadelphia were asking that question in 1976 and offering a $5,000 reward for the answer.
Ten years ago, Frederick Cione's relatives and colleagues were back in North Philadelphia, still asking the same question. They placed a plaque at 1712 W. Oxford Ave., where the 25-year-old rookie cop was gunned down about 1 a.m. Jan. 30, 1970.
"Hopefully, this plaque will generate some talk," Sgt. Paul Musi of the Homicide Division said in a 2004 Inquirer story. "That family is not over it, and won't be over it until it is solved."