John R. Fitzgerald was a 64-year-old male corrections officer, known as a centre keeper at the New Jersey State Prison in Trenton, whose working life had already spanned public service in several roles before violence in the prison finally claimed him. Born and raised in New Brunswick, New Jersey, he first held a responsible position in the state treasury department, then moved to New York to work in the Custom House.
In time he returned to New Brunswick, where the city's Common Council chose him as chief of police, a post he held for years before being appointed a deputy at the State Prison, a promotion that placed him inside one of the most demanding institutions in the state at the turn of the twentieth century.
On Friday, January 8, 1904, the routine of the prison shattered during what began as an ordinary work detail. In one of the prison shops, an inmate named Brooks was polishing brass when, without warning, he turned on a fellow keeper, striking him repeatedly over the head with an iron bar and knocking him bleeding and unconscious onto the stone floor. In the chaos that followed, Brooks tore a revolver from a deputy's pocket and bolted, weapon in hand, down the corridor in a desperate attempt to break free from the wing.
As guards rushed to stop him, Brooks fired the stolen handgun. One of the shots struck Centre Keeper Fitzgerald in the back as he responded to the disturbance, dropping him and leaving him grievously wounded. Other officers returned fire almost immediately, and Brooks was shot and killed on the spot, ending the threat almost as soon as it had begun. Contemporary accounts and later official summaries agree that there was never any doubt about who pulled the trigger; the gunman was already an incarcerated convict, identified as Brooks, and he died in the exchange of gunfire inside the prison itself.
Fitzgerald survived that day, but the bullet changed the rest of his life. The wound left him permanently disabled, and over the following years his health deteriorated under the lingering effects of the injury. Reports describe him suffering a paralytic stroke after the shooting and living for several years in declining condition at his home on Prospect Street, his working days at the prison long behind him but his body still bearing the damage from the attack. In May 1911, after years of struggle, he died at home; a Camden newspaper remembered his passing under the stark headline that a “convict's bullet finally killed” him, explicitly tying his death back to the gunshot he had received inside the Trenton prison seven years earlier.
Because Brooks was killed by prison officers during the incident, he was never arrested in the conventional sense, never brought before a civilian court, and never tried or sentenced for shooting Fitzgerald; the responsibility for the attack, however, was fixed squarely on him in contemporary news reports and later law-enforcement memorials. Official summaries list the cause of Fitzgerald's death as gunfire, with the offender noted simply as an inmate who was shot and killed, and modern homicide and gun-violence databases record Fitzgerald as a victim whose fatal wound originated in that January 8, 1904 outburst behind the prison walls in Trenton, New Jersey.