On a crisp autumn evening, September 30, 1939, Frank Casper, a 28-year-old white male, sought a clandestine rendezvous on Duck Island, a secluded spot in New Jersey known to courting couples. A mechanic from Trenton, Casper was in a parked car with 36-year-old Katherine Werner, a neighbor with whom he was engaged in an affair. The quiet of the lovers' lane was shattered when a figure emerged from the shadows of the surrounding trees, armed with a shotgun.
Without warning, the assailant unleashed a blast at close range, striking Frank Casper in the face and neck, ending his life in an instant. As panic ensued, Katherine Werner made a desperate attempt to flee the vehicle. Her escape was cut short when she was shot in the arm and then viciously beaten to death. The following morning, authorities would discover Casper's lifeless body in the car, and Werner's, partially concealed in a nearby refuse pile.
The brutal double homicide sent shockwaves through the community and added to a growing sense of dread. Casper and Werner's murders bore a chilling resemblance to a previous unsolved killing on Duck Island, leading both law enforcement and the press to the terrifying conclusion that a serial predator, dubbed the 'Duck Island Killer,' was preying on couples in their most vulnerable moments. For several years, the specter of this unknown assailant haunted the region, as more attacks were reported.
A breakthrough in the protracted investigation finally came in 1942. A couple who had survived one of the killer's assaults managed to provide police with a fragment of the attacker's shotgun, which held a partial serial number. This vital piece of evidence steered investigators toward Clarence Hill, a 29-year-old Black man and U.S. Army soldier stationed at Fort Dix. Hill, a husband and father of two, was arrested on January 28, 1944. In custody, he confessed to the string of violent attacks, including the murders of Frank Casper and Katherine Werner. On December 29, 1944, Clarence Hill was convicted for his crimes and received a life sentence, finally bringing an end to the 'Duck Island Killer's' reign of terror.
