Authorities have arrested a Pittsburgh man and charged him with murder in the shooting death of a United States Postal worker. Officials say 53-year-old Eric Kortz is believed to have shot and killed Louis Vignone, who was in his postal vehicle in Collier Township. He was pronounced dead at the scene of multiple gunshot wounds to the head. Authorities say that shortly after the shooting, Kortz arrived at the Carnegie Borough Police Department and turned himself in for the shooting. During a subsequent interview, Kortz informed Investigators that he shot Vignone because Kortz believed that Vignone and Vignone’s family had poisoned Kortz and Kortz’s family with cyanide when Vignone and Kortz were previously neighbors. Kortz informed Investigators that Kortz was aware of where Vignone worked. Kortz said he located Vignone on his mail route, drove his vehicle toward Vignone’s USPS vehicle, and stopped in front of the vehicle to stop Vignone. Kortz then stated that he “went to put some bullets in him”, referring to shooting Vignone. Kortz said that he then dropped the firearm at the scene, got into his van, and drove to the Carnegie Borough Police Department. Kort was expected to be arraigned Thursday evening.