The Philadelphia Police department recently announced a $40,000 reward for the arrest and conviction of the person(s) responsible for the murder of Officer Frederick Cione.
According to blog.phillypolice.com:
On January 30, 1970, Officer Frederick Cione was fatally shot while patrolling on the 1700 block of West Oxford Street in North Philadelphia. The 25-year old officer, on the job for just one year, was working in what was then the 23rd district. To date, Officer Cione’s killing remains the ONLY unsolved murder of a Philadelphia Police Officer.
The Philadelphia Bulletin report from 1970 is online at findagrave.com:
Mrs. Marie Cione worried about her son’s being a policeman, but most of all she worried when he worked the “last out” shift – midnight to eight in the morning. It was her custom then to tell him before he walked out the front door: “Be careful; take care of yourself.” Then the mother would remain awake, not going to beg until her husky son came home for breakfast.
The Philadelphia Daily News took another look in 1995: Elusive Killer Cop’s Murder 25 Years Ago Is Still Unsolved
You can read remembrances from investigators and loved ones, or leave your own at the Officer Down Memorial Page: Reflections for Police Officer Frederick J. Cione, Jr.