On a Thursday morning in October 2021, 58-year-old Louis Vignone, a 33-year veteran mail carrier for the U.S. Postal Service, was fatally shot while seated in his marked USPS vehicle at the intersection of Columbia and Suburban avenues in Collier Township near Carnegie, Pennsylvania. Neighbors remembered him as friendly, quiet, and looking forward to retirement; he was found in his postal uniform and pronounced dead at the scene after suffering multiple gunshot wounds, including a fatal head wound. Investigators recovered a firearm and seven spent shell casings in a nearby yard.

A 53-year-old former neighbor, Eric M. Kortz, turned himself in at the Carnegie Borough Police Department and, after being interviewed by detectives and a U.S. Postal Inspector, admitted to shooting Vignone, saying he had gone to put bullets in him. Kortz told investigators he believed, without supporting evidence, that Vignone and his family had poisoned Kortz and his family years earlier; the Vignones had moved away three years before to distance themselves from Kortz’s increasing obsession. Kortz was charged with murder of a United States employee and a firearm violation.

Does anyone in the area remember unusual encounters between Kortz and the Vignone family before the move, or other details about the day that could help clarify how Vignone’s route was located?