The two Holmesburg Prison inmates, Joseph Bowen and Frederick Burton, wanted a room to meet with their Muslim religious group.
So on May 31, 1973, they made their way into Deputy Warden Robert Fromhold's office. After their request was denied, they attacked him.
Hearing sounds of a struggle, Warden Patrick Curran, 47, rushed in and suffered the same fate as Fromhold, 51, stabbed to death with table knives Bowen and Burton had honed to razor sharpness.
They were the first and only correctional officers to be killed in the line of duty in the city.
Yesterday, in front of the old Holmesburg Prison on Torresdale Avenue, rows and rows of correctional officers, police officers and police commanders stood tall under the blazing sun to honor Curran and Fromhold during a plaque-dedication ceremony.